Yes that was what I was doing, but I did not remember anyone saying you could also double click the icon.
Because there is un-wanted & un-used code on the form HTML, and no-one has been able to tell me how to edit the code (delete) in Notepad++ I have now deleted the whole form and will start from the beginning again.
Now I have all the information (I Hope) I'm hoping I can run through it all once and get it right.
It would still be very helpful if anyone reads this post who can tell me how to import the code from anything in NOF into Notepad ++ so I can edit it & also how I then put the edited code back in NOF, I mean I don't know where to even navigate to, to find it.