Sorry, I missed your comment. I hope you're still interested!

I used a program called AssetRipper off github. You can load the whole game in there at once with Open Folder. Don't bother trying to search for anything from inside the program, just do Export All. The .cs files will then be in (wherever)/ExportedProject/Assets/Scripts.

Quick question, I was going to try and change something using C#. This will be a learning experience for me, but how exactly to I find the source code to edit? Not sure how to actually find the .cs file to change/modify.

Okay cool thanks :)

The mod only removes the code that limits what tier of tower you can build in a province.

You still need the quest, and it won't let you place a tower in a normally unbuildable area or anything like that.

For some clarification, does this grant me the ability to build citadels whenever I want, or just make every defensive tower I build for quests a citadel?