Why does Handbrake say finished encoding right after it starts with no results?

I have been using Handbrake for years and it worked great (PC Vista) but after upgrading from the 9.1 version to the 9.5 it now goes through the process of selecting the source and pressing start it stops almost immediately and says finished encoding. I looked on many of the bulletin boards and followed the instructions that said to change compatibility to service pack 2 and run as administrator but I still have the same problem. Anyone have any idea how to fix this? I tried to find a place to download and install 9.1 but no luck. Thanks -Steve