OK - I think I know what's going-on.
If you purchased HFX 4.5 with S8, as I did, you probably can't enter HFX 4.5 Serial No into Start / All Programmes / Pinnacle Studio for Hollywwod Fx for Studio 6 / Enter your plus or PRO Serial No, which you could for S10 & S11 (I think), to Unlock HFX Vol 1, in those Versions, but possibly not, in S12 .
Since I have S10.7 Installed with HFX Vol 1 Installed, as well as S12 Installed, I could Transfer the Unlock info, via S12's Transfer Wizard.
Try the 1st paragraph & see what happens in S12, anyway..
That makes me think that maybe they are from the older versions of Studio.
HFX Vols 1 & 2 are older Versions, originally Installed with S10/11 (But you had to Unlock them, by purchasing an Activation Key, unless you had the Sreial No for Vol 1) & Vol 3 which wasn't Installed ( you had to Download from Pinnacle Website).
So - If Paragrarh 1 works, all you need to do is purchase an Activation Key for Vol 2 or just purchase an Activation Key for the Transitions you want?
I'm sorry I can't be more precise, however the whole process re; HFX Purchase & Activation is a nigjhtnare, as very many Poster in many Threads have discovered.
BTW - If you do manage to Unlock Vols 1 & 2, Don't Install S12.1 Patch Update afterwards. S12.1 has Deleted Vols 1 & 2, (Again, for many Posters in many Threads) & you''ll have to jump through hoops, to get them back again.
I'll repeat yet again: Pinnacle's method of delivering it's products is a nightmare
Good luck
& Anyone-else?