FabFilter

Hi, I recently left my univeristy where I had the Pro R in a lot of my sessions. Since I finished my studies there and I have some mixes to finish at home, I bought the Pro R2 in order to reopen my sessions and continue to work on them without losing my presets.
But it seems like I can't do that (I tried), I reopened my sessions but they said the plug is descativated, it's like it's a whole other plug. It seems like I should have the Pro R to reopen my plug ins but we can't buy it anymore nor have a license.
So I don't know what to do now and I really need to be able to open my workspace like it was. Is there a way to "upgrade" my plugs from the session or sthg like that ? Or since I have the Pro R2, get a license for the Pro R in a free way ?