I used to work as a freelance translator and had Trados freelance 6.5 (which must be ancient by now).
It is, indeed
Now I find myself in a situation, in which I could really use the old software for a few odd things. Naturally, my hardware has changed many times over and all I have left is the license.
I still have an account with SDL Trados, and it reads there that I can "generate" 1 license file (I have no idea what that even means, if anything).
Just redownload this file.
As I remember, this code will work on all the machines in the universe
If it doesnt't work, return the licence (a button like this should be available) and regenerate it.
I had dongles up to Trados 2006, I may be wrong somewhere...