Sorry for delay in answering.
I deleted both.
However, it turns out that did not work. I have to pause FastKeys or exit the application.
Also, I misspoke. I do not use Excel 2010, I use Excel 2003.
Yes, I realize its very old, built I use Excel only for three spreadsheets loaded with macros that I have been using for twenty plus years. It's too expensive to upgrade to Office 365 and my macros wouldn't work in the new Excel anyway.
Others, however, are experiencing the problem with newer versions of Excel as well.
Anyone, I have learned to live with this. Not ideal, but you do what you have to do.
Thanks for listening.
Windows 11 Issue
I'm having the same issue on Windows 10 with FastKeys v5.09. Disabling "tab" as a selection key and restarting FastKeys fixed the problem.
FYI - This alt+tab issue is cross posted here: viewtopic.php?t=1921
FYI - This alt+tab issue is cross posted here: viewtopic.php?t=1921