Thank you both very much for your help.
I have now managed to get Knots up and running using the method suggested by nc50lc.

As for the Blockchain re download issue, Knots seems to have picked up the information I already had by itself without me needing to do as @nc50lc suggested.

I'm just hoping that there will be no further issues now. I have stopped core from launching on startup in favour of Knots but that is as far as I have gone in removing core from the laptop.

Thank you again. I really appreciate your assistance.