This is another very low-priority issue that cropped up while I was fiddling around trying to better learn the game.
I am using the v1.00.02 update.
I have placed two custom bitmap images in the 1939 campaign folder (units.png and weather.png). The game loads and uses these images as expected.
I exit the 1939 game to the game menu and start a 1940 game. The 1940 game folder has no custom .png images. The game map and units for the 1940 game are drawn whitewashed (see image). If I click on the weather button, the map is drawn normally - click again the map becomes whitewashed again. It appears the engine remembers that it was using custom images (from the 1939 game) and tries to again for the 1940 game but can't find any .png files in the 1940 folder.
If I exit all the way out to the desktop and relaunch WarPlan, then the 1940 game draws map and units correctly, not trying to use any custom bitmap images.
(At least that's what I think is going on.)

