Relative export path

Hello!
I just read the v1.3.4 changelog and it says

Ability to set a relative path for export paths in project settings.

However, I am still unable to set the relative path in my project. I tried the same project and route as my previous answer in this thread.
When I run “Export->Export UI Files” a File Explorer appears asking me to set the Export folder.
How should I set the paths?