[Just bought, won't work, "Assertion Error"]

Perhaps related to your monitor setup?  Did you reduce to 1 and test?  When I reference that cpp file/line I see this:

   //Monitor
   BIND_FUNC(90, TMonitorHandle, gsCreateMonitorEx, gs5_monitor_callback cbMonitor, void * usrData, const char* monitorName)
   cbMonitor, usrData, monitorName
   BIND_END

[Calling all Metal Heads]

4:00 adrenaline rush every time.