all collections gone

My tabox extension is successfully synced with Google, but all of my collections (maybe dozens) are gone. I clicked restore from backup, and it just goes blurry and hangs there indefinitely. I tried disabling and re-enabling. no better. I tried uninstalling and reinstalling, no better. I tried importing a collections file from last year which doesn't have all of the collections, and it fails to import anything without an error message. Any ideas?