Comment 1 for bug 962449

I appear to have the same problem, however I can't confirm if the daemon is running or not, but as there is no activity and no tray icon, I would say no.

I removed via terminal command -> sudo apt-get remove --purge desktopnova and re-installed via Synaptic Package Manager, starting the app again resulted in the previous wallpapers loaded in the fresh install, and still it fails to change the desktop backgrounds.