HOW TO INSTALL MODS
Via game directly:
Find the desired mod at this site and download it.
Unpack mod folder in
C:\Users\*Username*\Documents\Paradox Interactive\Hearts of Iron IV\workshop\content\281990\
If folders are missing, try running the game or make them by yourself.
Unpack .mod file in
C:\Users\*Username*\Documents\Paradox Interactive\Hearts of Iron IV\mod
Enable desired mods from the launcher and click Play button.
Enjoy the game:)
Find the desired mod at Hearts of Iron IV Workshop page.
Visit mod’s page and click the Subscribe button (you should be logged in).
Wait until files are downloaded (make sure your Steam app is running and has access to Internet).
Now you can enable mods in game launcher.