Thank you, esteemed colleague! This is a very useful mod.
Added 23 hours 29 minutes later
I've thought a lot and concluded that it's not just the fan-made pwl images that are being replaced, but also the images of the standard campaigns. This is a failure.
Plan B.
I've updated the mod and the description in comment #477.
Pwl in all fan-made maps will automatically be "cropped" from 1024x1024 (image 1024x768) to 1024x576 and stretched to 1366x768, just like it's done with the campaign images. Pwl will lose the bottom x192 pixels of the image. Losing a small piece of the image for proportional stretching and comfortable display in HD is not a high price to pay. The mod's file date is now normal.