After downloading a file navigation scheme, it is not automatically put to use.
All the schemes that you download are listed in the File Navigation Scheme drop-down list on the Navigation page in the file type configuration. They appear in alphabetic order among the schemes that ship with EditPad Pro. This drop-down list is shown in the screen shot below.
To use one of the schemes, create or edit a file type, and select the file navigation scheme you want from the File Navigation Scheme drop-down list.