"Does not work" is always a great way to explain things.
Anyways, you might be the only person that has ever happened to then.
As for reinstalling, not sure why you decided to do that - but you do you.
(If mods, for whatever reason, messed up for you.. could have: Uninstalled modpack, or gone to \mods\ and \res_mods\ folders to delete them, instead of reinstalling the entire game)