Okay.
I downloaded the latest version today to use.
I'm on an Imac 2.5 Core I5 running OSX 10.7.5
Firstly I came on, put in a title, selected "DVD-Video". Then dragged in the MP4 files. It converted them, then I brought them in.
Then I notice the 'Burn' button is, how to put it, blank I guess? It was a bit frustrating given the time It took to convert and I was thinking.. great, another useless piece of software. Then, I played around with a few things.. and out of pretty much chance I reselect the "DVD-Video" in the drop down menu and
wallah.. The burn button is active again.
So yeah, sound like a very minor glitch, but none the less, I am reporting this so other users can benefit.
Regards, and thanks for the software!