SPF Editor of Revit SPF Organizer 2018 has been enhanced a lot.
The Merge SPF Files command will merge some SPF files into the current editor. It asks for the SPF files first.
After the Open button is clicked, the picked files will be merged accordingly. An information dialog will appear to report what has been done.
In case the editor is blank before the merging operation, the editor may look as follows after.