New App Icon (round edges, etc)
Instance Name is now in the title bar at the top (before it was hard to tell what instance you were on after login)
Embedded Reports, Cheat Sheets, and Backups now download
Reports download correctly now and don't hang on second try of same report, etc
New command line argument to automatically select an instance on startup
Windows Example:
Flex4.exe -flex-instance=yourflexsitename
Mac Example:
open Flex4.app --args --flex-instance=yourflexsitename
Since the app is saved to the Applications folder, you might need:
open -n /Applications/Flex4.app --args --flex-instance=yourflexsitename
Windows: Flex4 app actually closes now vs staying as a lingering process
...