Ah! The penny has just dropped for me!
Its the name isn't it. I was using it in IE7 (The Vista default). When I installed one of the earlier releases of IE8, it migrated the program perfectly. I have kept up to date with the releases and so far IE7Pro seems to be performing 100%.
Give it a go. Bottom line is it wont harm your setup and can easily be uninstalled if you are not happy.
FWIW. I am at the moment using IE8 to post - with IE7Pro running in the background.