My airports have been installed now for over a year and I get this error when starting FSX says [airports installed correctly do you want to activate on this PC]. Thay have been on here for over a year same Pc . Does this error cost me me toward my 6 activations???
First, it's not possible you get THIS error (-25001) with airports installed for a while, unless your registry has been corrupted in some way, so the Serial inside it has changed.
As explained, countless of other times already, the very act of confirming your activation if you lose your Serial in the registry (usually for external causes, like bugged registry cleaners), will NOT count as an activation!
As explained, countless of other times already (both in the manual and in the forum), an activation is consumed ONLY with doing a MAJOR hardware change, or when reinstalling Windows from scratch but, if the PC is all the same, it will likely not consume an activation even in that case.
If you purposely remove your serial, and have the Addon Manager requesting the activation again, this can be done an unlimited number of times, if the hardware doesn't change.