[jurialmunkey]

Made a new API key, and it seems to not throw the 401 after starting Kodi. However i get no ratings.

I cleaned/removed my library
Used universal movie scraper, enabled all ratings
input the api key in the scraper also
Updated library
But no ratings. 

is there a cache or something thats preventing this?

Scraper is irrelevant. The ratings aren't taken from the Kodi library. They are looked up online directly from the omdb API.

Since you scraped your whole library it is probably likely that you hit your daily 1000 request limit on omdb.

Also, Arctic Zephyr 2 doesn't use TMDbHelper for ratings. It uses SkinHelper. There are clear instructions about ratings on the first post of the Arctic Zephyr 2 thread.

Arctic Horizon is the only skin of mine that uses TMDbHelper for ratings.