Name Mangler 3.5 is out now, with full support for macOS Mojave’s Dark Mode. We’ve also added a new Filter menu item (in the View menu) that lets you see only modified files (moved from the main View menu) or only files that generate errors or warnings (new and very useful). Check the release notes page for all the details.
Direct users can update within the app, or by downloading the full app from the Name Mangler page. App Store users should now (or shortly) see the update in the App Store app.