My origanal problem caused by ctr-z:
I tried this Fix:
I created a new blueprint with the character class attached, i open it and copy the component. to gain all the details. I then open up my original mycharacter blueprint and with the aim of pasting,overwriting the broken component info with a healthy one but there is a bug and it crashes out. Once u have copied a component by means of right click copy, the as soon as you are over another component and right click it crashes out hard. No data to be able to send. Looks like i have to start from video 1. Slightly off-putting 
As a beginner following a long tutorial, the introduction to blueprints 3rd person. It seems a mammoth task that for having your character running around 1 minute and having a broken Engine the next is really off-putting.
I guess this whole problem has not been noticed due to the nature. Most probably only a beginner like myself can cause such a mess.
Brett