I've scoured the search function and have seen people with alike problems to what I have, unfortunately none of the solutions for them seem to work for me.
A little background info:
Haven't played DCS since 2016.
Steam Version. (Unfortunately)
Recently reinstalled the game and loaded it up. Upon startup it begins telling me that my hardware has changed and serial keys need to be reactivated. I reactivate them all with each window that pops up for my multiple additions.
Loaded the game up and was surprised to see it saved a majority of my configurations that were made for flying, even though a majority is different hardware. Though I still have the SSD that the game was previously installed on, this time it has been installed on one of my additional SSD's.
Okay, so now for the problem. When I tried to load up and play the new Huey campaign it just sits in Map Menu. F1 doesn't bring me to cockpit. I tried the original campaign and same thing. So I exited the game to start it back up and it brings up request for 3 addons to reactive (again). Among these is the 1H-UH.
After some various restarts I notice that Flaming Cliffs, Black Shark, and 1H-UH ask for activation every single time. I tried to verify cache on steam. Same thing. Uninstalled and reinstalled. Same thing.
I remember an old fix some have used with removing activations in HKEY_LOCAL_MACHINE\Software\Leatherhead (or something like that) but it's not even a file with that name. Sooooo, I've come for help!