Most important change is ability to edit actions. No need to recreate actions any more, you can just use "Edit" menu entry.
Another change: BAS script can be executed now without user interaction, use "--silent" command line to achieve that. With this flag you can schedule BAS scripts to run every day, on windows start, etc. See this article for more info.
With new version, you can define function, which will be run one time on application start. Visit wiki for explanation.
Edit actions (no need to recreate them); "--silent" command line to run scripts without user interaction (scheduling); a function that runs once on application start