I had a problem with CTWin version 9.91.002 when trying to control my Yaesu rotor via Ctrl F10. Ken has fixed my problem with a new version of CTWin and I imagine it will shortly be available on the CT Software page. It works for me as an upgrade to my CTWin version 9.87 as well as a totally new CTWin 9.91 installation. W7UPF