is the file extention for Excel addins.
that's the only clue I have.
Open Excel, then from the menu click Tools>addins and see if something there is ticked that might match Aware97, and untick it.
If that cures it then that's the source of the problem identified... but that course of action might not be the best way to cure the problem!
Sorry I can't be of more help.
Which version of Excel is it?