installed Qcad last night and so far I am liking what I see. At this point the trial add-ons are not necessary for me, so I would like to remove them. Pressing the "x" button next to them pops up a message saying that the plu-in will be removed and to that I should restart Qcad.
However, when I restart the plugins are still running. I am using Qcad on Ubuntu 13.04 64-bit.