I'm pretty sure that I am looking where you asked me to look. If I go to System Settings > Update; the screen I see says 126.96.36.199 then has a blue update button in the middle. When I hit the button it says I am up to date.
It is possible that I have an older version installed, I only worked on updating until everything functioned correctly. In my instance, the map box wasn't working and the Fly Safe data base wouldn't update, it would ask me every time to update it but it would stall before updating. The newer DJI Fly 4 app fixed my issues.
Thanks so much for the reply and for holding my hand through all of this. I am a little surprised / disappointed that the OFFICIAL DJI forum seems to have not had ANYONE reply to my threads about the P4P+ (except for the one response by DJI Thor which I think he then deleted after posting).
I might just try and install the current APK for DJI GO4 from the DJI site and hope that it works. I got a pretty good deal on the whole kit so if I brick the controller I guess I won't be too sad.
I just wish that DJI customer service was better. I know they have a lot of products out there, and that the original P4P / P4P+ are no longer current products, but you would think they would be a little bit better at confirming what apps work with which firmware (and which firmware is current for their controllers).