So here's what happened:
1. Bought the PC client and made a FF account and have been paying monthly since release
2. Wanted to try out the FF PS4 client on my new PS4, so I downloaded the trial version around Christmas
3. I had to make a new account, since I wasn't allowed to use my payed FF account with the trial PS4 client
4. I liked the controls on the PS4 so I bought the PS4 client as well (making this bold since I want to make sure it is understood that I now own a legal PS4 client as well)
5. I start the client which now says it's unlocked. I want to play on my payed acccount now
6. I cannot change my userid! When I click on the userid field, nothing happens.

Again, just to make sure: I have a payed account and I have bought the PS4 client. Now how do I get rid of that trial thing?