Please quit System Preferences before installing ! If you want auto updates, please give a try to Aerial's new installer/updater here : https://github.com/glouel/AerialUpdater
This beta changes a lot of things, you will need to reconfigure your cache settings ! If you want more details on what's new, check this issue : #1006
Fixes:
- Many fixes
Note: Big Sur Beta 3 users, there's an issue currently with that beta of macOS regarding 3rd party screen savers, check this post on how to get back your settings and cache : #1006 (comment)
This macOS bug affects not only all versions of Aerial, but all 3rd party screen savers.