• Included mu-plugins in site exports #861
• Repurposed Demo Sites as Preview Sites
• Localized Studio docs for Spanish
• Improved name and folder generation and error handling when adding a site #900, #901
• Added tunneling support #936
• Increased timeouts for import and export commands #904
• Fixed URL and port replacement on creating a new site from backup or existing folder #944, 962
• Misc minor bug fixes and UI improvements

Download Studio for macOS (Intel or Silicon) and Windows: https://developer.wordpress.com/studio/