diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 671640e..9add043 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -121,6 +121,7 @@ add_executable(MassBuilderSaveTool WIN32
     ProfileManager/ProfileManager.cpp
     Profile/Profile.h
     Profile/Profile.cpp
+    Profile/ResourceIDs.h
     MassManager/MassManager.h
     MassManager/MassManager.cpp
     Mass/Locators.h
diff --git a/src/Profile/Profile.cpp b/src/Profile/Profile.cpp
index 69ddccc..7c850de 100644
--- a/src/Profile/Profile.cpp
+++ b/src/Profile/Profile.cpp
@@ -27,6 +27,8 @@
 #include "../UESaveFile/Types/IntProperty.h"
 #include "../UESaveFile/Types/StringProperty.h"
 
+#include "ResourceIDs.h"
+
 #include "Profile.h"
 
 using namespace Corrade;
@@ -70,11 +72,52 @@ auto Profile::steamId() const -> std::string const& {
 }
 
 void Profile::refreshValues() {
-    _profile.reloadData();
+    if(!_profile.reloadData()) {
+        _lastError = _profile.lastError();
+        return;
+    }
+
+    _name = _profile.at<StringProperty>("CompanyName")->value;
+
+    auto prop = _profile.at<IntProperty>("ActiveFrameSlot");
+    _activeFrameSlot = prop ? prop->value : 0;
+
+    prop = _profile.at<IntProperty>("Credit");
+    _credits = prop ? prop->value : 0;
+
+    prop = _profile.at<IntProperty>("StoryProgress");
+    _storyProgress = prop ? prop->value : 0;
+
+    prop = _profile.at<IntProperty>("LastMissionID");
+    _lastMissionId = prop ? prop->value : 0;
+
+    _verseSteel   = getResource("ResourceMaterial", VerseSteel);
+    _undinium     = getResource("ResourceMaterial", Undinium);
+    _necriumAlloy = getResource("ResourceMaterial", NecriumAlloy);
+    _lunarite     = getResource("ResourceMaterial", Lunarite);
+    _asterite     = getResource("ResourceMaterial", Asterite);
+
+    _ednil        = getResource("ResourceMaterial", Ednil);
+    _nuflalt      = getResource("ResourceMaterial", Nuflalt);
+    _aurelene     = getResource("ResourceMaterial", Aurelene);
+    _soldus       = getResource("ResourceMaterial", Soldus);
+    _synthesisedN = getResource("ResourceMaterial", SynthesisedN);
+
+    _alcarbonite = getResource("ResourceMaterial", Alcarbonite);
+    _keriphene   = getResource("ResourceMaterial", Keriphene);
+    _nitinolCM   = getResource("ResourceMaterial", NitinolCM);
+    _quarkium    = getResource("ResourceMaterial", Quarkium);
+    _alterene    = getResource("ResourceMaterial", Alterene);
+
+    _mixedComposition      = getResource("ResourceQuarkData", MixedComposition);
+    _voidResidue           = getResource("ResourceQuarkData", VoidResidue);
+    _muscularConstruction  = getResource("ResourceQuarkData", MuscularConstruction);
+    _mineralExoskeletology = getResource("ResourceQuarkData", MineralExoskeletology);
+    _carbonisedSkin        = getResource("ResourceQuarkData", CarbonisedSkin);
 }
 
-auto Profile::companyName() -> std::string const& {
-    return _profile.at<StringProperty>("CompanyName")->value;
+auto Profile::companyName() const -> std::string const& {
+    return _name;
 }
 
 auto Profile::renameCompany(const std::string& new_name) -> bool {
@@ -90,14 +133,12 @@ auto Profile::renameCompany(const std::string& new_name) -> bool {
     return true;
 }
 
-auto Profile::activeFrameSlot() -> Int {
-    auto active_frame_slot_prop = _profile.at<IntProperty>("ActiveFrameSlot");
-    return active_frame_slot_prop ? active_frame_slot_prop->value : 0;
+auto Profile::activeFrameSlot() const -> Int {
+    return _activeFrameSlot;
 }
 
-auto Profile::credits() -> Int {
-    auto credits_prop = _profile.at<IntProperty>("Credit");
-    return credits_prop ? credits_prop->value : 0;
+auto Profile::credits() const -> Int {
+    return _credits;
 }
 
 auto Profile::setCredits(Int amount) -> bool {
@@ -118,9 +159,8 @@ auto Profile::setCredits(Int amount) -> bool {
     return true;
 }
 
-auto Profile::storyProgress() -> Int {
-    auto story_progress_prop = _profile.at<IntProperty>("StoryProgress");
-    return story_progress_prop ? story_progress_prop->value : 0;
+auto Profile::storyProgress() const -> Int {
+    return _storyProgress;
 }
 
 auto Profile::setStoryProgress(Int progress) -> bool {
@@ -141,174 +181,177 @@ auto Profile::setStoryProgress(Int progress) -> bool {
     return true;
 }
 
-auto Profile::lastMissionId() -> Int {
-    auto last_mission_id_prop = _profile.at<IntProperty>("LastMissionID");
-    return last_mission_id_prop ? last_mission_id_prop->value : 0;
+auto Profile::lastMissionId() const -> Int {
+    return _lastMissionId;
 }
 
-auto Profile::verseSteel() -> Int {
-    return resource("ResourceMaterial", 0xC3500);
+auto Profile::verseSteel() const -> Int {
+    return _verseSteel;
 }
 
 auto Profile::setVerseSteel(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC3500, amount);
+    return setResource("ResourceMaterial", VerseSteel, amount);
 }
 
-auto Profile::undinium() -> Int {
-    return resource("ResourceMaterial", 0xC3501);
+auto Profile::undinium() const -> Int {
+    return _undinium;
 }
 
 auto Profile::setUndinium(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC3501, amount);
+    return setResource("ResourceMaterial", Undinium, amount);
 }
 
-auto Profile::necriumAlloy() -> Int {
-    return resource("ResourceMaterial", 0xC3502);
+auto Profile::necriumAlloy() const -> Int {
+    return _necriumAlloy;
 }
 
 auto Profile::setNecriumAlloy(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC3502, amount);
+    return setResource("ResourceMaterial", NecriumAlloy, amount);
 }
 
-auto Profile::lunarite() -> Int {
-    return resource("ResourceMaterial", 0xC3503);
+auto Profile::lunarite() const -> Int {
+    return _lunarite;
 }
 
 auto Profile::setLunarite(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC3503, amount);
+    return setResource("ResourceMaterial", Lunarite, amount);
 }
 
-auto Profile::asterite() -> Int {
-    return resource("ResourceMaterial", 0xC3504);
+auto Profile::asterite() const -> Int {
+    return _asterite;
 }
 
 auto Profile::setAsterite(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC3504, amount);
+    return setResource("ResourceMaterial", Asterite, amount);
 }
 
-auto Profile::ednil() -> Int {
-    return resource("ResourceMaterial", 0xC350A);
+auto Profile::ednil() const -> Int {
+    return _ednil;
 }
 
 auto Profile::setEdnil(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC350A, amount);
+    return setResource("ResourceMaterial", Ednil, amount);
 }
 
-auto Profile::nuflalt() -> Int {
-    return resource("ResourceMaterial", 0xC350B);
+auto Profile::nuflalt() const -> Int {
+    return _nuflalt;
 }
 
 auto Profile::setNuflalt(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC350B, amount);
+    return setResource("ResourceMaterial", Nuflalt, amount);
 }
 
-auto Profile::aurelene() -> Int {
-    return resource("ResourceMaterial", 0xC350C);
+auto Profile::aurelene() const -> Int {
+    return _aurelene;
 }
 
 auto Profile::setAurelene(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC350C, amount);
+    return setResource("ResourceMaterial", Aurelene, amount);
 }
 
-auto Profile::soldus() -> Int {
-    return resource("ResourceMaterial", 0xC350D);
+auto Profile::soldus() const -> Int {
+    return _soldus;
 }
 
 auto Profile::setSoldus(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC350D, amount);
+    return setResource("ResourceMaterial", Soldus, amount);
 }
 
-auto Profile::synthesizedN() -> Int {
-    return resource("ResourceMaterial", 0xC350E);
+auto Profile::synthesisedN() const -> Int {
+    return _synthesisedN;
 }
 
-auto Profile::setSynthesizedN(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC350E, amount);
+auto Profile::setSynthesisedN(Int amount) -> bool {
+    return setResource("ResourceMaterial", SynthesisedN, amount);
 }
 
-auto Profile::alcarbonite() -> Int {
-    return resource("ResourceMaterial", 0xC3514);
+auto Profile::alcarbonite() const -> Int {
+    return _alcarbonite;
 }
 
 auto Profile::setAlcarbonite(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC3514, amount);
+    return setResource("ResourceMaterial", Alcarbonite, amount);
 }
 
-auto Profile::keriphene() -> Int {
-    return resource("ResourceMaterial", 0xC3515);
+auto Profile::keriphene() const -> Int {
+    return _keriphene;
 }
 
 auto Profile::setKeriphene(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC3515, amount);
+    return setResource("ResourceMaterial", Keriphene, amount);
 }
 
-auto Profile::nitinolCM() -> Int {
-    return resource("ResourceMaterial", 0xC3516);
+auto Profile::nitinolCM() const -> Int {
+    return _nitinolCM;
 }
 
 auto Profile::setNitinolCM(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC3516, amount);
+    return setResource("ResourceMaterial", NitinolCM, amount);
 }
 
-auto Profile::quarkium() -> Int {
-    return resource("ResourceMaterial", 0xC3517);
+auto Profile::quarkium() const -> Int {
+    return _quarkium;
 }
 
 auto Profile::setQuarkium(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC3517, amount);
+    return setResource("ResourceMaterial", Quarkium, amount);
 }
 
-auto Profile::alterene() -> Int {
-    return resource("ResourceMaterial", 0xC3518);
+auto Profile::alterene() const -> Int {
+    return _alterene;
 }
 
 auto Profile::setAlterene(Int amount) -> bool {
-    return setResource("ResourceMaterial", 0xC3518, amount);
+    return setResource("ResourceMaterial", Alterene, amount);
 }
 
-auto Profile::mixedComposition() -> Int {
-    return resource("ResourceQuarkData", 0xDBBA0);
+auto Profile::mixedComposition() const -> Int {
+    return _mixedComposition;
 }
 
 auto Profile::setMixedComposition(Int amount) -> bool {
-    return setResource("ResourceQuarkData", 0xDBBA0, amount);
+    return setResource("ResourceQuarkData", MixedComposition, amount);
 }
 
-auto Profile::voidResidue() -> Int {
-    return resource("ResourceQuarkData", 0xDBBA1);
+auto Profile::voidResidue() const -> Int {
+    return _voidResidue;
 }
 
 auto Profile::setVoidResidue(Int amount) -> bool {
-    return setResource("ResourceQuarkData", 0xDBBA1, amount);
+    return setResource("ResourceQuarkData", VoidResidue, amount);
 }
 
-auto Profile::muscularConstruction() -> Int {
-    return resource("ResourceQuarkData", 0xDBBA2);
+auto Profile::muscularConstruction() const -> Int {
+    return _muscularConstruction;
 }
 
 auto Profile::setMuscularConstruction(Int amount) -> bool {
-    return setResource("ResourceQuarkData", 0xDBBA2, amount);
+    return setResource("ResourceQuarkData", MuscularConstruction, amount);
 }
 
-auto Profile::mineralExoskeletology() -> Int {
-    return resource("ResourceQuarkData", 0xDBBA3);
+auto Profile::mineralExoskeletology() const -> Int {
+    return _mineralExoskeletology;
 }
 
 auto Profile::setMineralExoskeletology(Int amount) -> bool {
-    return setResource("ResourceQuarkData", 0xDBBA3, amount);
+    return setResource("ResourceQuarkData", MineralExoskeletology, amount);
 }
 
-auto Profile::carbonizedSkin() -> Int {
-    return resource("ResourceQuarkData", 0xDBBA4);
+auto Profile::carbonisedSkin() const -> Int {
+    return _carbonisedSkin;
 }
 
-auto Profile::setCarbonizedSkin(Int amount) -> bool {
-    return setResource("ResourceQuarkData", 0xDBBA4, amount);
+auto Profile::setCarbonisedSkin(Int amount) -> bool {
+    return setResource("ResourceQuarkData", CarbonisedSkin, amount);
 }
 
-auto Profile::resource(const char* container, Int id) -> Int {
+auto Profile::getResource(const char* container, Int id) -> Int {
     auto mats_prop = _profile.at<ArrayProperty>(container);
 
+    if(!mats_prop) {
+        return 0;
+    }
+
     static auto predicate = [&id](UnrealPropertyBase::ptr& prop){
         auto res_prop = static_cast<ResourceItemValue*>(prop.get());
         return res_prop->id == id;
@@ -321,6 +364,10 @@ auto Profile::resource(const char* container, Int id) -> Int {
 auto Profile::setResource(const char* container, Int id, Int amount) -> bool {
     auto mats_prop = _profile.at<ArrayProperty>(container);
 
+    if(!mats_prop) {
+        return false;
+    }
+
     static auto predicate = [&id](UnrealPropertyBase::ptr& prop){
         auto res_prop = static_cast<ResourceItemValue*>(prop.get());
         return res_prop->id == id;
diff --git a/src/Profile/Profile.h b/src/Profile/Profile.h
index 513e817..3d7061b 100644
--- a/src/Profile/Profile.h
+++ b/src/Profile/Profile.h
@@ -45,81 +45,81 @@ class Profile {
 
         void refreshValues();
 
-        auto companyName() -> std::string const&;
+        auto companyName() const -> std::string const&;
         auto renameCompany(const std::string& new_name) -> bool;
 
-        auto activeFrameSlot() -> Int;
+        auto activeFrameSlot() const -> Int;
 
-        auto credits() -> Int;
+        auto credits() const -> Int;
         auto setCredits(Int credits) -> bool;
 
-        auto storyProgress() -> Int;
+        auto storyProgress() const -> Int;
         auto setStoryProgress(Int progress) -> bool;
 
-        auto lastMissionId() -> Int;
+        auto lastMissionId() const -> Int;
 
-        auto verseSteel() -> Int;
+        auto verseSteel() const -> Int;
         auto setVerseSteel(Int amount) -> bool;
 
-        auto undinium() -> Int;
+        auto undinium() const -> Int;
         auto setUndinium(Int amount) -> bool;
 
-        auto necriumAlloy() -> Int;
+        auto necriumAlloy() const -> Int;
         auto setNecriumAlloy(Int amount) -> bool;
 
-        auto lunarite() -> Int;
+        auto lunarite() const -> Int;
         auto setLunarite(Int amount) -> bool;
 
-        auto asterite() -> Int;
+        auto asterite() const -> Int;
         auto setAsterite(Int amount) -> bool;
 
-        auto ednil() -> Int;
+        auto ednil() const -> Int;
         auto setEdnil(Int amount) -> bool;
 
-        auto nuflalt() -> Int;
+        auto nuflalt() const -> Int;
         auto setNuflalt(Int amount) -> bool;
 
-        auto aurelene() -> Int;
+        auto aurelene() const -> Int;
         auto setAurelene(Int amount) -> bool;
 
-        auto soldus() -> Int;
+        auto soldus() const -> Int;
         auto setSoldus(Int amount) -> bool;
 
-        auto synthesizedN() -> Int;
-        auto setSynthesizedN(Int amount) -> bool;
+        auto synthesisedN() const -> Int;
+        auto setSynthesisedN(Int amount) -> bool;
 
-        auto alcarbonite() -> Int;
+        auto alcarbonite() const -> Int;
         auto setAlcarbonite(Int amount) -> bool;
 
-        auto keriphene() -> Int;
+        auto keriphene() const -> Int;
         auto setKeriphene(Int amount) -> bool;
 
-        auto nitinolCM() -> Int;
+        auto nitinolCM() const -> Int;
         auto setNitinolCM(Int amount) -> bool;
 
-        auto quarkium() -> Int;
+        auto quarkium() const -> Int;
         auto setQuarkium(Int amount) -> bool;
 
-        auto alterene() -> Int;
+        auto alterene() const -> Int;
         auto setAlterene(Int amount) -> bool;
 
-        auto mixedComposition() -> Int;
+        auto mixedComposition() const -> Int;
         auto setMixedComposition(Int amount) -> bool;
 
-        auto voidResidue() -> Int;
+        auto voidResidue() const -> Int;
         auto setVoidResidue(Int amount) -> bool;
 
-        auto muscularConstruction() -> Int;
+        auto muscularConstruction() const -> Int;
         auto setMuscularConstruction(Int amount) -> bool;
 
-        auto mineralExoskeletology() -> Int;
+        auto mineralExoskeletology() const -> Int;
         auto setMineralExoskeletology(Int amount) -> bool;
 
-        auto carbonizedSkin() -> Int;
-        auto setCarbonizedSkin(Int amount) -> bool;
+        auto carbonisedSkin() const -> Int;
+        auto setCarbonisedSkin(Int amount) -> bool;
 
     private:
-        auto resource(const char* container, Int id) -> Int;
+        auto getResource(const char* container, Int id) -> Int;
         auto setResource(const char* container, Int id, Int amount) -> bool;
 
         std::string _profileDirectory;
@@ -129,6 +129,36 @@ class Profile {
 
         UESaveFile _profile;
 
+        std::string _name;
+        Int _activeFrameSlot;
+        Int _credits;
+        Int _storyProgress;
+        Int _lastMissionId;
+
+        Int _verseSteel   = 0;
+        Int _undinium     = 0;
+        Int _necriumAlloy = 0;
+        Int _lunarite     = 0;
+        Int _asterite     = 0;
+
+        Int _ednil        = 0;
+        Int _nuflalt      = 0;
+        Int _aurelene     = 0;
+        Int _soldus       = 0;
+        Int _synthesisedN = 0;
+
+        Int _alcarbonite = 0;
+        Int _keriphene   = 0;
+        Int _nitinolCM   = 0;
+        Int _quarkium    = 0;
+        Int _alterene    = 0;
+
+        Int _mixedComposition      = 0;
+        Int _voidResidue           = 0;
+        Int _muscularConstruction  = 0;
+        Int _mineralExoskeletology = 0;
+        Int _carbonisedSkin        = 0;
+
         std::string _steamId;
 
         bool        _valid = false;
diff --git a/src/Profile/ResourceIDs.h b/src/Profile/ResourceIDs.h
new file mode 100644
index 0000000..085bf40
--- /dev/null
+++ b/src/Profile/ResourceIDs.h
@@ -0,0 +1,47 @@
+#pragma once
+
+// MassBuilderSaveTool
+// Copyright (C) 2021 Guillaume Jacquemin
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+#include <Magnum/Types.h>
+
+using namespace Magnum;
+
+enum MaterialID : Int {
+    VerseSteel   = 0xC3500,
+    Undinium     = 0xC3501,
+    NecriumAlloy = 0xC3502,
+    Lunarite     = 0xC3503,
+    Asterite     = 0xC3504,
+
+    Ednil        = 0xC350A,
+    Nuflalt      = 0xC350B,
+    Aurelene     = 0xC350C,
+    Soldus       = 0xC350D,
+    SynthesisedN = 0xC350E,
+
+    Alcarbonite = 0xC3514,
+    Keriphene   = 0xC3515,
+    NitinolCM   = 0xC3516,
+    Quarkium    = 0xC3517,
+    Alterene    = 0xC3518,
+
+    MixedComposition      = 0xDBBA0,
+    VoidResidue           = 0xDBBA1,
+    MuscularConstruction  = 0xDBBA2,
+    MineralExoskeletology = 0xDBBA3,
+    CarbonisedSkin        = 0xDBBA4
+};