smartftp won't start anymore

I've had this same problem with smart ftp for a few years now on a variety of machines. Sometimes the program refuses to load, it shows the "SmartFTP Expiration" notice as usual. Which it always shows no matter how often I update. Then when you click ok nothing happens, there is no error message and there is no process running to kill or anything. Reinstalling the software does not change anything. It just simply doesn't start. what can i do to resolve this?

I am running vista business 32 bit, but i've had the same thing happen with XP