After reading a lot of posts, I still can't figure out if the Interop Unlock is kept while updating to the latest updates. I tried to downgrade to an "unlockable" version, unlocked, made the unlock "permanent" (via Registry edit) then update, but this didn't work.
I used the WindowBreak unlock, achieve to use it with older version, but when I updated, it wasn't unlocked anymore.
Did I do something bad ? Or did I misunderstand everything ?