This seems to be a problem when running the installer with elevation. A fix has been released for it in Squirrel, and our installer is updated to use the latest released version of Squirrel now. The new installer will be released at some point in the future.
A workaround, is to delete
C:\ ProgramData\SquirrelMachineInstalls\Fuse.exe and also remove the startup entry http://www.pcadvisor.co.uk/how-to/windows/how-change-windows-10-startup-programs-stop-apps-opening-3615075/. Then run the installer with no elevation (don’t run as adminstrator).