Open in default application (like double clicking in file manager)
Open with external (set your external app path in Settings - Lychee is known to work here)
Better details view
Much clearer sign posting on where you are and what you're doing
Moved "edit model" stuff into special "Edit details" window, accessible from the usual spots
Enabled cover image to be selected from anywhere in the filesystem
Add alias to library name. Note this doesn't currently propogate into the auto-generated tags, it's an interface change only. Use the exclude/include behaviours to modify your library name if that's important to you.
Added "scan from here" into the scan context menu
Added some prerelease notes in the release notes window