QTR-Quadtone RIP

Apologies if this has been covered earlier but my forum search didn't come up an answer: I am using 2.6.2.0 (that's the GUI module, the other modules vary, one module is all the way down to 2.3). Do I install 2.7 on top of my current installation or do I delete the old one first?

I've read of some bugs... I'm using Windows XP Pro and print tiffs generated by Photoshop Elements 6.0. I use Premier Art FineArt paper, an Epson R1800 using Eboni ink, with curves supplied by Paul Roark. Should I expect any issues?

My main reason for wanting to upgrade is so that I can use jpg files. That would be very useful.

Thanks all, and especially to you, Roy!

Paul