CHIRP

Hello. I am having some real problems programming two Yawes A-338Plus radio’s I bought. The programming software is meant to be TYT TY-F8PG. Problem is it will not allow me to program any frequency in above 469.995 mhz. The new A-338Plus radio is supposed to be 400-520 mhz TX/RX and 134-176 mhz TX/RX. I want to program in all the Australian UHF CB frequencies from CH01 (476.425mhz) right up to CH80 (477.4125) and also program the Repeater Frequencies 1-8, 31-38, 41-48 and 71-78, the offsets being + 0.750mhz.
Simply, the software you sent just won’t do it! 469.950mhz is its max, it doesn’t recognise that the Yawes A-338Plus is now a 400-520 TX/RX radio.
PLEASE HELP. Ian.