You shouldn't have to change any of the options on the port. Going to device manager will just let you know what com port it is. Next to the device listed in device manager it will say "COMX" X being the number 1,2,3,4,etc. When you open the program, there's a button in the bottom left that says "Set com port" click on that, then click on the drop down and choose the com port you found in device manger. Then you should be able to click open device in the bottom left corner. Maybe I misunderstood your problem.

screenshot.jpg