RedQuits (or alternative) on Mac OS X 10.10

I have installed RedQuits on Mac OS X 10.10 (Yosemite). Unfortunately, it is not working at all.

I have made sure that RedQuits has access to System Preferences > Security & Privacy > Privacy > Accessibility, but it seems to not work.

Currently, the RedQuits website states it works with Mac OS X 10.6.

Does anybody know how to get RedQuits working with Yosemite, or of any alternatives that will cause the close button to quit an application?