First install (no hotfixes) was straightforward. I was able to activate with no problems. But after Hotfix 3, NGX is not working anymore. I unistalled and install again (the lastest download version, with hotfix 3 integrated), but this time I wasn't asked for any serial code (odd). The reinstall didn't change anything; when I get into the cockpit everything is dead (engines are running though): No EFIS, no FMS, nothing, nada. Is there any way to force the program to reactivate again? Maybe deleting some license files? Regards!