How can I build more than 12 buildings in Europa Universalis without using a mod?
Solution 1:
What you are trying to do is, as of version 1.19, not possible I fear.
You can use this site to straight download Steam Mods for installing it manually.
The mod might easily be compatible with 1.19 since unless the building slots system was changed since that patch (which I doubt) the only difference is the verison specified in the .mod folder.
I would also like to add that we discourage piracy.