That's to be expected.
Every new build of any sim, being FSX or P3D, always require a new build of the Addon Manager ( Couatl and GSX are NOT affected, only the Addon Manager .DLL ), just like any new build of the sim requires a new build of, for example, FSUIPC and so many 3rd party modules that rely on features not possible with Simconnect, so they need to access memory directly.
The new addon manager build will be available soon, as usual.