I found an old QDF-backup file, that appears to be Q2015. I'm using Q2016 and when it tries to convert the backup, I get a request for what I guess is the Intuit password. It says I've changed the pwd (I entered what I thought it might be, at the start of conversion), and the Password Vault has been reset. I'm offered a pwd change option, but during that, a blank popup screen appears, and that's as far as things go.
Anyone know of a workaround for this?