BLCMM was primarily built for Steam versions. It often fails to auto-detect the Epic Games Store version or the UHD (4K) update version because their file structures or executable signatures differ from the original Steam release.
Since BLCMM is a Java-based application, an outdated Java Runtime Environment (JRE) can cause file dialogue errors. Update Java: Ensure you have the latest version of files aren't opening correctly, run a utility like to repair the file associations. 5. Check for Read-Only Attributes blcmm invalid file selected
How to Fix the "BLCMM Invalid File Selected" Error in Borderlands Mod Manager BLCMM was primarily built for Steam versions