Yup, as far as I can tell it works the same as RecordNow MAX.

New PX507 Engine now available from here http://support.sonic.com/Downloads/engine.asp

I am sure that fixes LG and 4.50 problem. Care to give it a try Jay boy?

Nope even with the latest Px Engine it wouldn't detect it. Weird thing is, while reinstalling RecordNow MAX, I had to uninstall RecordNow DX, just like you would need to reinstall a previous version to update.