Manage UI translations addon requires Translation Branches Directory to be set

While trying to use the “Manage UI translations” addon I got the error

“Please set your Preferences’ ‘Translation Branches Directory’ path to a valid directory”

Found that it can be set on Preferences - File Paths - Development - i18n Branches

ONCE, the developer extras is enabled on Preferences - Interface - Display

This should be documented, maybe on

https://wiki.blender.org/wiki/Process/Translate_Blender