Are we supposed to reactivate the aircraft after a complete reinstallation?. I've uninstalled and reinstalled the aircraft and I've never been asked to reactivate it. Also,i got a panel freeze only 8 minutes after take off. That's getting worse and worse. Hope that PMDG will fix that problem soon. Just grounded the aircraft and fly other aircrafts.

I can't believe that nobody has an answer to that above question.

If you didn't had to reactivate (i reïnstalled once and no reactivation either) you could uninstall again and before reïnstalling making sure that all NGX related files are removed from your system. Not only in the Aicraft folder but also from the PMDG and the Gauges folder. I've personally not installed any hot fixes, so maybe you could try that first to and see if it works well. Hope this helps,