How do I change the com port. I use a Surface pro which has only one usb port, so i bought a HUB in order to use a mouse and my laser but the laser no longer see's the surface pro. Thanks in Advance
@DunsterGoth The Nano does not work well with hubs, even powered as you get conflicts due to the high data rate needed for sending G-code. The COM port is assigned by the driver.
In T2Laser you can disconnect (right click big red button or use Machine menu) and then choose COM port.