For me -at least - the load times are just impossible with this version. I haven't tried uninstalling and reinstalling but have rebooted the machine, but loading a save game or a new mission is taking multiple minutes
Crash to desktop on completion of cleaner autopsy (day 14) Crashes straight from strategy view - no window pops up but I checked timing when restarting to determine cause
Attempted assault on cleaner HQ. Was able to place soldiers in intial phase but clicking on MARS unit caused crash (red text on screen then crash)
MARS unit was equipped with heavy armour, missiles and basic 2nd gun if it helps