I have the latest version of CATvids and had made changes to a video in my database. I have the program set to create an automatic backup when I exit the application. When I exited the application, I got an error message indicating that the program needed exclusive access to the database to do the backup. When I clicked OK, I got another message saying that the backup failed. At the time that this error occurred I also had my AssetCAT database open. Once I closed AssetCAT and then made further changes to my CATvids database, the backup was done successfully.
Not sure why the error occurred when I had 2 different databases open at the same time. I don't know if this same problem could occur if I had my StampCAT database open at the same time as my CATvids database.