I added the ability to switch which hand is holding which item (gun/paddle) with the Application Menu button. On the Rift Touch controllers, this is the B or Y button, on the hand currently holding the gun. On the Vive, this is the button above the touchpad (on the gun hand).
This wasn't a big deal on the Vive, since you can just move the controllers freely between hands, but was necessary for the Touch controllers, since they're fitted to your left and right hands.
Also updated the engine to Unity 2018. I believe I fixed all the bugs this introduced, but if you run into anything, please post something in the bug forum here, and I'll try to fix it right away. Thanks!