The selected tab is allready in use.........etc

I origonally got the err msg that the certificate had expired, now get the above err.
I followed instructions in this post to delete the cert, restarted Acronis, but no change.
http://forum.acronis.com/forum/10558
On restart no new cert. is downloaded
I note that problems with expirered cert's were origonally posted back in 2009, but nothing appears to have changed.
The problem is on two PC's, only glad I only opted for the monthly subscription, which I'm unlikely to be continueing with.
David