HK Pilot Mega 2.7 Issues with Firmware? APM Planner 2.0?

I have had numerous issues with my quad after updating to the latest firmware and software. Nothing is showing in the Standard Parameters Tab and now I get a pre arm check warning for PreArm: ACRO_BAL_Roll/Pitch. I have no way to go in and disable the prearm check. I just want to fly. I should have left well enough alone and shouldn’t have updated. Now I am grounded. Any and all help is appreciated.

I am using MAC OS X version of AMP Planner 2.0

I also don’t get the Standard Parameters showing any longer in my APM Planner.
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What version of ArduPilot are you using?
APM 2.6 & up - no longer supported for Copter or Plane. The last firmware builds that fit on this board are Copter 3.2.1 and Plane 3.3.0.

Thats What I initially upgraded too and ran into the issues. I have tried reverting back to the older versions with no luck.

This is fixed in the latest releases of APM Planner 2.0.20+