Ok… actually another problem I have been working on for almost a week and of course I find the solution right after posting haha.
I deleted these 3 files after shutting down the Sonarr service:
And it seems to be working now after restarting the service. I’m not sure if it’s all 3 files that helped (and I’m actually afraid I should not have downloaded the 2 databse files), but I have a feeling it’s the sonarr.pid file that was in use before my computer lost power, so the DB was locked by this file. I’m sure someone here will be able to correct me if I,m going in the wrong direction.