UAssetGUI is a Windows Forms desktop application for low-level examination and modification of Unreal Engine game assets. It allows users to open, edit, and save .uasset, .umap, .pak, and .utoc files, with JSON export/import, C# scripting via embedded Roslyn, property mappings for unversioned assets, and full theming and localization. The architecture is a monolithic GUI built on .NET 10 preview, relying on the UAssetAPI submodule for serialization. Key entry points are Program.Main and Form1 (the main editor window). The application targets modders and researchers who need to inspect or alter binary asset data directly. It includes custom controls, a plugin-like script system using collectible assembly load contexts, and supports container file extraction/repacking via native binaries. The codebase is well-structured for its niche but tightly coupled to Windows Forms and the UAssetAPI ecosystem.