Keynetix license cannot be read

Recently when trying to compile AGS files from Excel spreadsheets I've been getting a message saying I'm on the free version of Keynetix and it can only compile 10 lines of data from one worksheet at a time. When I try to reapply my license to reactivate the full version I get an error message saying the license file cannot be read.

I've also tried deactivating and reactivating KeyAGS in the COM addin section of Excel's options menu to no effect.

What can I do to make the Excel addin work properly?