How to enable Beta version
Before release the public version sometimes we publish a test version with lasts new functionality.
This is for a testing purpose, so don't enable it if you need a stable release.
To enable Beta version, after you register your copy, you'll find a new settings in License tab:
Fill the checkbox and save your preference.
Once you have activate it you'll be informed automatically by Wordpress if there is a new Beta version,
and the installation procedure is exactly the same of stable version.
To get quickly the new beta release go to Plugins archive page and click on "Check for updates".
Disable Beta release
You can disable whenever you want Beta version simply removing the check from settings.
If actually you get a Beta version installed you can Rollback to previous version, or update to newest stable version if available.