Starting this past weekend, users that have Flash Player 11.4 beta 1 installed are now receiving regular updates via the Flash Player update service!
We would like to encourage everyone interested in using and testing the upcoming release of 11.4 to take a minute and install the current beta on labs.adobe.com. When installing, please make sure you select "Allow Adobe to install updates (recommended)" to ensure you receive the latest updates which we will make available over the coming days and weeks.
For more information, please see this blog post:
Background Updates are here for Flash Player 11.4 Beta!! Yes, for Beta!!