Imtoo DVD Ripper 5 Standard Edition - Keeps Freezing on Windows 7

I have recently purchased the above software online. I am having a problem when I try to open a DVD, prior to ripping.

The problem occurs whilst, the programme searches for the disc info. It begins to find all the chapters on the disc and then towards the end it freezes. You can cancel down this box, but then as soon as you attempt to select anything on the screen it freezes again, and you get the “Not Responding” message.

I am trying to run this software on Windows 7, is this a compatability issue?

I have tried several times to uninstall it and then reinstall it but still encounter the same problem.

Can anybody help?