After the release of the new installer for the PMGD 737 NGX I downloaded it today. I followed the instructions and uninstalled the older version for P3D v3. When running the installer I choose to install both v3 and v4 at the same time.
The NGX runs ok in P3Dv4, but not in v3. After starting the sim and selecting any of the PMDG aircraft I get a window with this:
ERROR: Activation library handle creation failed.
Manually entering the right code in the popup window fails. I checked the FlexNet service but it seems ok. Reinstalled PMDG for only v3 and for both v3 and v4, nothing helps. Strangely v4 never complains about the activation code.
Any suggestions?