That was it, Condobloke! I had to remove it from the synaptic package manager (wasn't showing in my software manager). Document Viewer is now showing as the default application.
Whenever I open a pdf doc, the Image Magick window comes up with the wizard guy. After that, nothing happens, so I'm not even sure what this application is good for. I can right click and choose to open the doc with Document Viewer, but I'm unable to make this my default application. When I...