[kite]

Pitch n Time is truly amazing, and worth every penny ( or Cent for you Yanks !) -
Best way to use it I suggest, is not to try to process 8 tracks in one pass, but to always work either on a single file, or a stereo mix.
So, with your drums, bounce to a stereo track, and try processing that. Don't know about the Demo though -check with Serato !
I use PnT loads, for either small adjustments to loops , or even to lengthen a solo piano piece -it is truly amazing, as you cannot tell that any Time processing has been applied; however, stupid amounts may give some artefacts. For sensible adjustments, it's got to be one of the best, expensive, but it's paid for itself many times !!!