I have had my realflight g3.5 since christmas and it has worked good until today. I start it by plugging in the radio and clicking the icon on my desktop and click run realflight as i always do. It loads for a second and then a small error page comes up and says "invalid call", then i click "ok" and a second small window comes up and says "generic application error. Enable output for detailed infomation. This application will now exit."

Any ideas of what is wrong?

thanks in advance