I've just released Mp3tag for Mac v1.6.1 with the following changes:
New
- Added support for music player app Doppler so that changes made Mp3tag are reflected back in Doppler after saving.
Changed, Improved & Fixed:
- Added auto-conversion of HTTP to HTTPS for Custom Tag Sources.
I'm particularly happy about the interplay between Mp3tag and Doppler 2.1. You can now open Mp3tag from within Doppler via a new "Edit Info With" menu item and any changes you perform from within Mp3tag are automatically re-imported to Doppler. This means no manual refreshing or removing/re-adding of files 