Testing 0.15 here, finally, and... can't get it to work here either. Definitely running, shows the snap zones when it starts (when I change the tooltype for it to). I drag a window to an edge/corner, release... nothing. Increased the zone size - both percentage, then turned that off and went absolute - and couldn't find the right spot to get it to work. Sorry.
Amiga 500, 68030/50, RGB display.