I've had this problem before, it's to do with the load manager.
Download the standalone version and install it as admin.
Be sure to completely wipe your registry before re-installing. (Instructions above) Otherwise you will end up in the same situation you find yourself in now.

To the OP. Why are you angry with Captain Sim? You had it working perfectly before so that proves the software is sound.
How about thinking before slanging off like that?