There are a few things I'd change. First off, some entries do not need to point to your mod folder, they are better off pointing to the original. These include Demo, DefaultMainSettingsLow Medium and High, DefaultUserKeys.
Second off, make sure that every file you're pointing to actually exists. The file might fail to load if it doesn't find it.
Third, remove Utopia from these entries:
DefaultBaseLanguage = "Utopia/base_english.lang"
DefaultGameLanguage = "Utopia/english.lang"
This is because these are just the names of your lang files, not the location. The location is defined by your BaseLanguageFolder and GameLanguageFolder entries. So because you have Utopia in both, the path is effectively Utopia/config/lang/Utopia/english.lang which I doubt is the actual path and so you should change this.
Lastly, I'm not sure of an ending forward slash will affect this, but you seeing as it's not there originally, just remove the last one from your MainSaveFolder entry.