PHD2+Guide camera - dark frames, bad-pixel map or neither?

[Demonperformer]

I now see where I was going wrong - I was trying to amend the exposure time in the box on the window that has the 'generate' button, rather than clicking that button and making the alteration on the next screen.

Curiously, having created the new bad-pixel map, it is still saying that it has used 15s exposures (as opposed to the 5s exposures I actually used), but with 75% aggression (the program default) it has now identified 239 hot pixels and 7 cold pixels, so I am happy to run with that (for the moment at least).

Thank you, Louise, and all others who have contributed.