Did as you suggested, but to no effect. If anything it's worse.
I ran the purge, rebooted, re-installed CursorFX and ran it, with no improvement. So I re-booted the machine again, re-ran CursorFX, and still no improvement. Now, If I set the sounds, for instance, the sounds disappear as soon as I select another option, like Effects. As before, Trail selections effects work as before, but as before, Ghost, Life, Frequency and Opacity are all completely ignored.