@Coppa_Calypse It was possible for me to downgrade. I just did it with the epic games store version and launched into story mode. See this thread (https://forums.gta5-mods.com/topic/30865/mods-in-mods-folder-not-working/10). Read @blucker method. For epic games store version see my post for modification. Didn't even have to use launcherbypass or nolauncher, neither of which work for me anyway. Launched via regular GTAV.exe.
Update, apparently Rockstar updated their launcher which means game needs to be launched offline after reverting. To bypass follow these videos: