To prevent the file from being changed when you use the patcher, it needs to go into a custom UI folder. You have some choices:
1. If you already have EQ2MAP installed with no other custom UI, you can drop the unzipped file into that folder.
2. If you don't use EQ2MAP, you can create a simple custom UI folder using these generic instructions
and drop the unzipped file into it.
3. Alternatively you can install an empty DarqUI using these instructions
, which will create an empty custom UI folder and set it up as your default automatically. Drop the file into that folder and it will be the only customization in your game.