After reading all FAQ and reading the forums as well as doing multiple uninstalls and installs, I still get the following “not installed” message in the Content Manager:
I have carefully followed all the steps in your guide and everything installs as they should (including navdata in the community folder, however, for some reason FS2020 won’t recognize this.
Thanks for the swift reply Ian, I can indeed find those airports - should have looked those up earlier. However, my suspicions arose when there were a couple of waypoints still missing (such as VOLAM transition in MDSD) together with the “not installed” message in the content manager.