This initial release should be self-explanatory. Click on the arrow to turn your token that direction. If your token image doesn't face towards the bottom of the screen when it has no facing, the result will be off.
Click the middle button to set an arbitrary angle, or to easily zero the facing.
Use the .mtlib to practice using the new-fangled Addon Libraries, or drop the .rptok on your campaign to use the old-style Library token system.