Download the latest version of the Borderlands Hex Multitool from Nexus Mods.
.../Borderlands 2/Binaries/Win32/Borderlands2.exe blcmm invalid file selected
You are trying to open a mod file, but the file extension is wrong, the file is corrupted, or it is still locked inside a zipped archive. Scenario 1: The Error Occurs When Selecting the Game Path Download the latest version of the Borderlands Hex
This tool is particularly effective for users who experience issues with the Epic Games Store version of Borderlands, as BLCMM often fails to hex-edit that version properly. but the file extension is wrong