Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding General Current Limitations of the Toolset

Flash is an industry standard technology for game UIs. Scaleform GFx, which is Flash-based UI middleware, is used in all Unreal Engine games, all CryEngine games, all Gamebryo games, and so on. If you want to modify the UI for any game, you'll need to put in a lot more work than changing a few files. Look at the SkyUI project for Skyrim and Skyrim SE; those modders had to decompile and reverse engineer Skyrim's UI layer and SWF files. That's the way it goes. Welcome to modding!