Default [Q] Download mode not functioning

I have a LG G2 D800 (AT&T). When I put it into download mode, the download mode screen shows up but NOT the next screen (Firmware Update). Also the PC does not recognized the phone. I know the drivers are installed correctly because my other G2 is fine and the drivers get installed in the PC to adjust the serial port.

So my question is how can I use the LG FlashTool to go back to stock if I can't set the COM port to 41. My recovery and ADB are working and I am running Paranoid ROM. Is there other way to fix this other than going back to stock? Many thanks.