ORIGINAL: rmg
Addendum: I did just change PP for Japan, and some tech levels, and it seemed to save, great, now when I open the game, NO UNITS are on the map. SOS, thanks.
Using the editor is challenging, the reason that it will not display existing units, might be that
the editor uses a different land_units.csv than the one from the scenarios
the editor's version has two extra columns
HQ bonus & HQ commander ID, while it is missing the
Available in turns
This is just an assumption on my part, I'm not stating fact.
When I opened up the Guam scenario it did not show the units but it knew they were there because when I added a unit it placed at the end of the list.
Even if you create units with the editor, you will still have to modify land_units.csv to make them fully functional and to locate them on the map.
I hope this helps.