If you tell me which you're playing on (like mobile or PC), I can give you more specific tips for managing your game files.
VDX-DUI-v3.2.2.mcpack |-- pack.mcmeta |-- assets |-- dui |-- models |-- textures |-- ...
: Excellent for players who only want the Java-style chat without overhauling their entire menu system.
resource pack for Minecraft Bedrock Edition, created by the well-known UI modder
Because this version only modifies the chat screen and the chat HUD element, it is highly compatible with other UI packs that modify the inventory or main menus. It does not require the main pack to function. VDX: Java/Desktop UI v3.2.10 [v26.10] - CurseForge
To manually delete leftover files (Android/Windows):