Hi,
The 'r' key would toggle selection and rotation modes. So, if you have already pressed 'r' once, you can directly select without pressing 'r' again. And if it rotates when you want to select, just press 'r' to enter the selection mode.
In the beta, we give the full resolution mesh we got from kinect. So, the polygon count is higher. We are working on mesh simplification for the full version.
Thanks,
Chytu.