I am normally in Linux, so I booted Windows to try this. I added hardware as "Other" and then sub category to "Other". I cancelled out of the connect printer. Next you have to add the printer tab on the right. Scroll down, you will have to add the bed size, print center and shape. All of these settings must match your printer, but you can get these settings from your other computer. You can adjust the Gcode manually however you want. I have to do this because I run Duet electronics instead of the Azteeg boards. I use gcode programming instead of Marlin.
After you have that setup, you can export away.
