Broken by Sketch 3.9 with "Set Page's Stylesheet" selection loop.

CSSketch no longer functions with the Sketch 3.9 update. Attempting to assign a stylesheet to a sketch doc results in a selection loop:
1. Open a sketch doc. In this case the Keyboard.sketch example.
2. Select "Plugins" > "CSSketch" > "Set Page's Style"
3. Finder opens > Navigate to and select Keyboard.less stylesheet > Click "Choose"
4. After clicking the "Choose" button, it becomes disabled.
5. Reselect Keyboard.less > Click "Choose"
6. GoTo # 4 and repeat infinitum.