I manage many wordpress sites. When I updated one of them to version 3.9 I suddently started seeing a message that this was a developement site and that development version is available. The version has been constantly updated with the newest developement version since.
The problem is I never activated or installed the tester plugin. Uptime is crucial for this site and I don't want it to update to developement version. I tried removing all plugins and switching themes but the development version is still shown.
Do you have any ideas abou how to disable the developement versions?