According to Airac 2401; for P2ATC -> Taxi Mnt -> search for airport ICAO code -> Save/Load tab -> Load Airport Taxiways (choose the xxxx_Taxiways.gxl file from the download [replace xxxx with the ICAO code of the airport]) & Load Airport Gates (choose the xxxx_Gates.gxl file from the download)

In runway tab:

RW 05/23: uncheck everything / disable completely
(Reason: 05/23 is used for VFR flights only, so unless you are flying VFR, you should disable it)