In Horizon Client 3.2 and later, the Always connect at launch setting is enabled by default for the first server that you connect to with Horizon Client. When this setting is enabled for a server, Horizon Client always connects to that server when you launch Horizon Client.
To disable this behavior for a server, select the server shortcut on the Horizon Client Home screen, press Control-click on the Apple keyboard, and deselect the Always connect at launch setting. If you have other server shortcuts on your Horizon Client Home screen, you can enable the Always connect at launch setting for a different server.
You can enable the Always connect at launch setting for only one server at a time.