Curiosity is, it does only happen with my 2010 iMac - 12GB memory. with 2013 AirBook it works just fine. Tried to uninstall and reinstall, no change.
I am having a similar issue - Yosemite 10.10.1 and latest Total Finder - shut down is halted if Total Finder is running. Really only want to use it for coloring sidebar icons, but can’t restart or shut down if it’s been launched at startup. All but desktop image leaves screen and unit remains there unless force quit. Acts normally if Total Finder not running, or if launched manually after startup. Any ideas yet?