Now I am confused. I just replied to a post having logged in to an old account (user fanman20) which forums told me was closed.
Who am I today???? :o)

@burnout426
Thank you for your reply. I had checked the shortcut properties which were OK. Removing the sessions folder was also of no benefit.
Unfortunately, having never used JSONedit before, I was unable to easily edit the preference file to try that approach. Due to a desperate need to get it up and running, I saved all files and then deleted Opera completely adding a fresh install. I then copied a number of the files from my laptop which allowed me to recover most of my data. I have now re-installed ZebNet backup which I used to use on my old Desktop.

To leocg. Sorry I was not notified of your answer. It is Opera One. Having used Opera for so long I don't think of it as that.
Regards All.