I tried the steps described in Read this if "There was an issue loading your database" after updating to Build 880, again without success. Even the oldest backup in available (~5 weeks) ends up with a corrupted database message.
I am now starting from scratch with my library, rescanning everything. This is not great and as a paying customer, well, I’m wondering what it is I’m paying for if I have to spent a couple hours to debug and eventually start from scratch with my library. I would appreciate some thoughts from the Roon team on this point. For bonus points, maybe you can publish a post-mortem as this seems to affect a number of people.