If your Mac is running OS 10.12 (Sierra) or greater, you can override the Prefer tabs when opening documents setting in System Settings-Dock.
Yate allows you to set up two groups of tabbed windows. The Primary Tabbed Window and the Secondary tabbed window
The Primary Tabbed window is intended for Action Editor windows. You can choose Default, Always or Never for these windows. You can optionally allow the Action Manager, the Discogs Wizard and the MusicBrainz Wizard to be included in the same tabbed window.
The Secondary Tabbed window is intended for Database Viewer windows. You can choose Default, Always or Never for these windows. You can optionally choose to merge the Database Viewer windows into the Primary Tabbed Window.
Note that due to sequencing issues, changes to any of these settings may not take effect until the next time Yate is started.