Hmm...I could swear if you create a blank session, or somewhere at that first window you set the sample/bit depth. I've had to change it a few times lately, 24/44, 24/48, and 24/96. Should be able to do it all...once you are in a session, you can't change it though even if you haven't tracked yet you are stuck I think. Do it before you do anything else.
_________________________
Soundcloud: https://goo.gl/J0VHoC
Tonefinder: http://goo.gl/WI3Ahh
YouTube: https://goo.gl/6P3Mjg