Cascades is just full of updates today, this time it’s the UI Framework. They’ve changed APIs and also provided a guide so you can change from Beta 1 to Beta 2.
TabbedPane has been changed, it is now easier to use the tabs. ActionBar has had a general appearance improvement. Applications menu is now available if you pull down from the top. There is some more updates, read the full article at the Devblog.
Or head to the Cascades Beta2 site and download the update.