The latest version of MNU, 1.4.0, can be downloaded from my software site. The focus of this update is to support the changes brought in by Big Sur’s updated, iOS-esque UI: in this case, no more roll-down sheets, and iOS-style dialogs and square icons.
This release also incorporates ARM64 code so MNU will run natively on Apple Silicon-based Macs — when they become available. If you’re one of the folk who have an ARM-based Mac, please let me know about any problems you encounter. Click on MNU’s Configure button, select the About MNU… tab and click Send Feedback.
Full details about using MNU can be found here.