I tried that, but no change. I can still not open the files I couldn't open before.
Okay, I'm pretty sure that mod.io is messing this up... somehow.
If I try to open the texture file, from my appdata\local folder, the texture file in GIMP works and playing the mod works. If I manually download the mod from mod.io, the texture file opens in GIMP and the mod plays fine.
But if I subscribe to the mod and try to open the texture file in users\public\mod.io in GIMP, I get a file-size error and the mod doesn't work ingame.
But the thing is, the other texture file, doesn't have this issue and works perfectly fine in both the subscription and manual download.
I tried to upload three times now, and everytime the same error. What the hell is mod.io doing with that one texture file? oO
Edit: I just tried to manually download the ck3 pack, extract only the one texture file and pasting it over the corrupted one in the mod.io folder... and now the mod works! WTF?