there are 4 folders:
- Data/Editor/Mods: this contains necessary editor data (like uncompressed terrain files, effect editor files, data files for the stats editor etc)
- Data/Mods: this contains all local mod files (local templates, instances)
- Data/Public: this contains all global mod files (resources, root templates)
- Data/Projects: this contains meta data for the project used by the editor

so in this case the problem would be somewhere in the Data/Mods folder