Ok as promised for the OP.
The ACT mapping files are found in "C:\Users\[
yourusername]\AppData\Roaming\Cakewalk\ACT Data
Depending on your installs you'll find several files there that you can rename ie. add "bak" or something like that to them. You will of course lose any settings you already have but you can always delete the replacement and rename the original should that not prove to be the issue.