Hi Brendan,
I think this issue might be caused by the way you’re using Betting Assistant (it’s not easy to understand!).
Basically, before you close Excel, you have to “disconnect” Gruss from Excel (under the “Excel” menu). Otherwise, when you close the spreadsheet, it’s actually still open, behind the scenes! I appreciate this is a bit hard to follow…
If you’re not sure what I mean, try closing Betting Assistant completely first, then close Excel. You should then be able to delete the old version, and apply the new version.
We also released another update tonight, v1.47 is now available for download.
Cheers
Nick