Personal footprint library

Make a new project

Open the footprint editor (it will say no active library and you cannot save anything)

just choose a random library

Select: Save current libary as (and choose a filepatch and name for it. so you can find it again)

Go to "board view" and choose in Preferences -> Footprint library manager

add you custom library at the bottom, give it a good name and the location on your drive