And if you're worried about it breaking frosty, you can just move back the old moddata folder back to the battlefront folder and it will fix whatever may happen, but it is highly unlikely that something bad happens from moving the moddata folder because we know frosty re-creates it anyways. Yes, moving the mod-data folder is a trouble shooting thing, because if the app FMM doesn't find a mod-data folder it will create a new installation of your mod profile and that helps sometimes. If you dont have a mod data folder then you dont have to, but you should check. Navigate there through your file folder and move ModData to the desktop.
I believe it will be in ThisPC, windows, program files X86, Origin games, Starwars battlefront II. Also move your ModData folder to your desktop, so frosty can re-create a fresh one. And restart your PC and launch battlefront normally in between each time you install or move or uninstall something because if any game files are missing, launching will fix that.
(with steam I think you have to use frostyfix which I know basically nothing about except for the fact that it's a pain in the ass.) Im pretty sure you can add it to your origin library and then launch the game normally one time, then install frosty mod manager and add your revan mod then launch. Just launch and install the game through origin if you want to use mods. Even if you launch from steam, it uses origin in game and your origin account.
