I am sorry, guys. I had to jettison the Activate Orbiter plasmoid, as it was incorrectly written.
I have done the necessary rewrite and will fold in a replacement Activate Orbiter soon, so that you can properly get back to the desktop.
In the mean time, you can manually send the DCE command to trigger the desktop again by going to the web admin, selecting advanced > configuration > devices from the menu,
then selecting the On-Screen orbiter child of the appropriate media director, clicking send command, selecting Activate PC Desktop, then putting 0 in the main parameter, then pressing Send.