I'm using TB 8.3 32-bit, which I've had for about three months. It replaced an earlier version of TB (7.4, I think). Initially, it behaved fine, but for the last couple of weeks it's been giving errors. First thing I noticed was that my account structure had suddenly acquired an additional set of folders, so that I now have the usual inbox, outbox, sent mail, trash etc and then, underneath those, a duplicate set of inbox, outbox etc (there's no mail in any of these). I've tried deleting these folders, both from within the Bat and via Windows File Explorer, but they just reconstitute themselves when I start TB up. Along with this, I'm getting an error message when I try to exit from the Bat. It says: 'Stream write error: "D:/MyMail/ACCOUNT.FLB" Access is denied.' (D:/MyMail is the correct path to my installation). The file ACCOUNT.FLB does exist and I have set permissions on it to full control for everyone, to no effect. If I continue trying to close the Bat by dismissing the message, it does close, but then automatically starts-up again. I don't know if these two things are connected, or just co-incidental. Be grateful for any help or advice anyone might have.