I couldn't find any log files so I used the send logs function under the tools menu.
Found your logs, thanks. You have missing/problematic Windows USB drivers.
Wayne is most likely on the right path as to why this is the case, but if you have reason to believe your installation might have been corrupted you could reinstall the GS-911 PC application.
Your logs indicate a failure to load ftd2xx.dll which we ship in the USBDrv directories that should be located in your install directory. If they are missing, it's best to reinstall before considering a system restore or Windows troubleshooting.
Well I verified that file was there, but I re-installed anyway. Of course I can't test it because the software is up-to-date. Guess I'll find out next time.
Mike