GTA V iFruit App! Licence Plate

I have the iFruit app on iPhone and I can change the licence plate both on and offline.
The problem is, I made the licence plate say Smily which I wanted it to say, but now I'd like to change it to LSPD or Police.
Is there any way I can change what it says again or am I stuck with Smily. I tried deleting and reinstalling that app and turning on the tutorial again but nothing works.
It's really shitty if it can't be change, but that's R* for ya!

You can only change the plate once. You get one shot at making it whatever you want and that's it. Supposedly, later on in the game you'll be able to unlock more license plates so you have some variety to choose from, but you can't unlock any right now. Rockstar also hasn't been kind to people who send them support emails about it, primarily because a prompt pops up after you hit "Done" to tell you that this is your only opportunity to change the plate and to make absolutely sure this is what you want.