After this last update, there are other people who probably feel this way. It looks like the update has uncovered ‘latent corruption’.
Don’t do anything until @support weighs in, but see this post.
Delete Roon’s database. It can be found here. Roon will create a new one. You can then get into Roon to Restore a Backup. If your database has been corrupted for a while then there’s a good chance all your Backups are corrupted also. If that’s true, then you have no choice but to start from scratch.
Roon’s been aware of the possibility for corrupted Backups for quite some time, but until now they’ve chosen to ignore the problem.