I've been lurking in the DVDFab forum since I bought the software a couple months ago. I've always flown by the seat of my pants with this stuff, and my old standby programs were increasingly unable to back up my newer DVDs.
I had never been able to get trial versions of DVDFab to even analyze a disc without getting read errors, and was bummed after purchasing DVDFab Platinum because it didn't work either (duh).
I exchanged a few emails with Sunny at Fengtao support, trying to get help getting it running - or a refund. Sunny was great, helped me get it running right, and I'm learning some new tricks from this forum.
I just want to say what a great place this is to learn about backing up DVDs, and to thank everyone involved - those who ask the questions, and especially those who take the time to answer them.