Can’t you just remove the unwanted livery folders, instead of hacking the cfg file?
If’n the livery folders are also encrypted, they can still be deleted, or moved and then deleted. If you don’t know how to do this, I’m not going to name names, as some people get a little squishy when talking about moving or deleting encrypted files. The tools to do this are free, and easily searchable…think the google. Lastly, if you still can’t figure it out, please do not DM me. I’m responsible for my personal installation of MFS, but I won’t be responsible for anyone else’s installation. There is always a risk when deleting or moving files, and that’s a risk everyone has to come to terms with on their own.