I searched the boards and can't find an answer to this problem.
I D/Led the "Mouse to Yoke" program from Lovett Software.
However, it appears the program won't work with the updated version of FS9. There's nothing on the author's site that addresses this.
Oh, well . . . So I removed the program, but now FS9 won't run, I keep getting the same error message (from the program I removed) that I have the wrong version of FS9 to work with the Mouse to Yoke software.
Before I re-install (oh, #####!) I thought I'd ask to see if anyone has figured this one out.