>>528769911. Make sure the game folder is as close to your drive's root folder as possible. For some reason it has trouble finding files if it's too deep in your hard drive.
2. You should have a folder called [UTILITY] KKManager. Open that and run KK Manager to find any mods you're missing. Click Look for Updates... in the toolbar. You don't need to download anything listed in Studio Items, since that'll probably be like fifty fucking gigs there.
3. If you don't have the folder above, you didn't get a current repack. Search screwthisnoise on nyaa and download the latest version instead. You can back up your User Data folder and just overwrite the new download's version to save anything you made or downloaded.