Yes, just make a backup copy of the realtrack folder in another place other than the RealTracks folder.

Open Realband set the tempo the same as the RT.

Drag the wav or wma file in onto the the tack name of an empty track.

Ctrl+A to highlight the whole track, right click >Time Stretch & Pitch Shift. . Pitch +12 ok.

Drag track number to wav in drop station, drag out to folder.

Remove the wma files and wav (if you have them) just leaving the new wav files renamed to match the original wma/wav files.

There's a bit of stretching involved but if you are happy with results go for it else you would be better using midi.
Normal
oz0101_+0.mp3

Up 1 Octave
oz0101_+12.mp3