repair ship mod

I have downloaded the repairship mod, but cannot seem to get it to work! I have used this in the past, so know that it does work, but since re-install, I just don’t remember how!
I’m not sure if it’s the keybind in flux.ini, or whether I need to extract any of the files from the zip somewhere.
Any chance of an idiots guide on how to get it to work?

Cheers