Pack 64.7z -

If PACK 64.7z is a custom archive you've encountered, the standard way to produce its content is via 7-Zip : : 7z x PACK 64.7z -o./OutputFolderName

: Create a folder named "Joplin" and extract the contents of app-64.7z directly into it. PACK 64.7z

: Use a tool like 7-Zip to open the main installer and extract only the app-64.7z file. If PACK 64