Changing team name with FM Editor problem

Hello. (Not sure if this is the right forum, so apologies in advance)

In Football Manager 2017, I'm trying to change a team short name (from "Hamburger SV" to just "Hamburg" using the recent data update and through the FM Editor, but I can't seem to get it sorted.

I load the Official 17.3 database, then I load the "load data editor", presumably I then choose "Club & League changes" file and finally "save editor data". But then any changes that I saved in the editor don't appear in the game and I've still got "Hamburger SV" as the short name.

Can anyone help? What am I doing wrong?

Thanks in advance