I know it's been a year, but any chance you remember what folder name you edited? I'm having the same issue but I didn't edit any of the folder names and I'm scratching my head. Thanks in advance!
The folder name within the mod folder has to be "AricsExpansion" exactly with no space at the front or back of the name. Sometimes depending on how you extract it, it may also extract to a subfolder (where you have a folder structure of "AricsExpansion/AricsExpansion").
