Search for this line in the bt_screen_menuButton.m

//grid
if([buttonLayoutStyle isEqualToString:@grid] || [buttonLayoutStyle isEqualToString:@]){

The value on line 5 is normally set to 1.5..  below I changed the value to 0.50 for my particular project.

Original BT Post: www.buzztouch.com/forum/thread.php?tid=D4171AB69A804A4001802F3