Keep getting "Self-protection failed. Error code: 4" when trying to run it. Don't know if that's just me, though...........
Most likely a program is preventing the game from starting. This is usually caused by something like EasyAntiCheat, but you should try disabling antivirus and running as administrator otherwise.
There may also be conflicts with the "Skaian Survey" data folder; I would recommend cleaning this out too. Otherwise, this is an error I've not encountered yet.
Sorry for your troubles!