I’ve found a bug in 5.4.
My menu/setup mode is normally set to simple.
I tried to set up an FTP password, after upgrading to 5.4. The option isn’t there. All that’s there is Device or Utilities. Selecting Utilities will trigger a crash. Selecting Logs, will trigger a crash.

Now here’s the twist. Change menu/setup mode to Expert, and it all works fine, password is there and no crashes when selecting the menu items mentioned before.