ENA-6: Can't open project files in Scratch Desktop from the finder on Mac / Explorer on Windows

Scratch projects, .sb, .sb2, or a .sb3, that has been saved to your computer can't be "opened with" Scratch Desktop. If you right click on one and choose Open With it does not suggest Scratch Desktop. If you choose Other it opens the browser window and Scratch Desktop is not highlighted as a possible option.

If you change it to from "Recommended Applications" to "All Applications" you can choose Scratch Desktop.app but it just opens Scratch Desktop with the default project open, not the one you were trying to open.

These files can be opened from within the application just fine.

Steps to reproduce

Navigate to a Scratch project file in your file browser
Right click on the file and choose "Open With"
Note: Scratch Desktop does not appear on the short list of options
Choose "Other"
Note: a finder window appears open to Applications, Scratch Desktop is in the list but gray
Change "Recommended Applications" to "All Applications"
Click Scratch Desktop
Note: Scratch Desktop opens but it is to the default project

Operating System

Mac