I bought Movie Edit Pro 2016 which came with NewBlue Action Cam addon, later upgraded to 2017 which came with NewBlue Titler Pro Express. They installed fine at the time, I still have the installers and serial numbers now...
However, when I try to install them with the current version of Move Edit Pro, they fail as they both say it's the wrong version. One wanting 2016, the other 2017. Yet, obviously, it is the same software! I have both plugins running on my old PC, but I'm trying to install them on my new laptop.
ALSO, probably more important, I am assuming I can never install them again after my old PC is replaced, so will lose them altogether at that point? Is there some other way of porting them over to the latest version of MEP? Or is it intended to be this way, so you can only really have the plugins temporarily? I mean, you could technically have them forever if you never replace your PC, or just update the hardware, but leave everything installed as it is...