After a fresh install (0.5.3127) the preview complains with errors like these. User is admin on the machine.
C:\Program Files (x86)\Fuse\Simulator\Outracks.Simulator.Client\Outracks.Simulat or.Client.Uno.unoproj(1,1): Warning WUNKNOWN: Unable to save cache: Access to th e path ‘C:\Program Files (x86)\Fuse\Simulator\Outracks.Simulator.Client.cache\U XL4\logger.cpp-57301d52’ is denied.
NB a preview (local) also gives these errors but does launch a preview window.