Did not work

It didn’t work so I reinstalled, then rebooted computer; still did not work. The icon shows on dock but it does nothing, no window comes up. and the menu at top has nothing, just blank, can’t even quit the app. I’m using Mavericks and keep it up-to-date. Compatibility says OS X 10.9 or higher so it should work on my comp.

Kessee about UnRAR Free