Darwin, in my case I went from 1.9.3 straight to 1.10.2, which per your note should be fixed in that version. One possible difference is that I did NOT under 1.9.3 previously have the TotalFinder.osax component installed in /ScriptingAdditions folder, as I always have SIP off and never needed the ‘workaround’. So in the case of installing 1.10.2, when prompted to install the SIP workaround component, I thought it couldn’t hurt, in case I ever accidently turn SIP back on. But in this case there was no previous version in that folder to overwrite. I fixed the issue same way as Laneo, manually delete the component after the first time installation fails, then running it again.