To use apps still in development, you can click the “R” in the Apps Panel, that changes it to a “B” which shows apps that are in Beta. Click the "OK" button to start using Beta Apps.
Choosing Beta will only show the apps that are still being tested and debugged. Click the "B" icon to go back to Released apps.
Click the "R" icon in the Apps menu to toggle to "B" version of available apps.