restore from tape that used BE 11d with BE 2010

I have to restore a file that was backed up using BE 11d. I have just upgraded to BE 2010 on a Win 2003 R2. I tried to upgrade to 2012 but that failed misserably. So I had to completely un-install and clean up things and then down graded and went to 2010 instead. Now I have the old 11d tapes but they are not in the inventory. How do I get them into inventory so I can restore a file.

Thanks

Joel