For some reason in the email I recieved with the download link I got two activation keys, upon initial load-up of the NGX it accepted the first code I gave it, now I've been experiencing freezes and visual problems, my other post about those is at this link: http://forum.avsim.net/topic/341484-fsx-freezes/page__p__2041093#entry2041093 Is that normal to not ask for reactivation? Also my other addon aircraft won't work now.. PMDG, Level-D, Wilco, etc... Thanks in advance,

Yes, it's normal for the system to not ask for reactivation.