I have installed the 2015 Upgrade but my early Real Tracks & styles from 2013 have disappeared. They were on the 2013 PlusPak USB drive. That has now disappeared as I have been using the program on my internal HD. Does anyone know if the 2013 Real Tracks & styles can be downloaded and, if so, how much as I have purchased them once already? Thanks.

So the tracks were on the USB drive and you ran the BB app from the main drive.

Did you set the drive path in RT/Drum Preferences after program upgrade ?
Did you do a Rebuild & Fix ?

I use Mac which probably means I'm a computer luddite but no is the answer to all your questions. Except that I did run the program from my internal HD Thanks.