If you want to stay on .509 craft firmware, you should not be upgrading your RC or app going forward, assuming it works. I suggest you load 1.02 firmware into the
P4P+ controller, and if it works, FREEZE everything, turn off app auto updating, and any OS updating, and be happy with the virtues of .509 as long as possible. Don't be tempted with new features when a new app or OS is released for the integrated tablet, otherwise you may sacrifice the priceless compatibility with .509 firmware in the craft.
Let us know if 1.02 RC firmware in the +controller works with .509 craft firmware so others with the
P4P+ controllers will know what's possible.