KPDX gates not servicing stock AI

I just downloaded the KPDX update, and it looks awesome, but there is one problem. the Stock AI do not park at the gates, all the stock traffic is on the cargo and GA ramps. I don't have a fancy AI pack and don't really care for one, so how do I reset it so that the gates are coded to the stock airlines again?

If you installed this, be sure you followed all the directions he lists.

https://flyawaysimulation.com/downloads/files/10243/portland-international-airport/

yeah, that's the one I used, and I followed all the instructions he gave.

Going into the BGL and removing the airline codes from the gates manually seemed to get some traffic back to the gates, but a lot of planes are still parked on the ramp.

It looks as if you did as much as you could.
If you want, email the designer, tell him your problem and maybe he can figure it out.
They are a nice bunch and probably will try to help.