YAHOO !!!
Got it all working again as it should do.

I was worried about deleting the C:/BB folder and re-installing and then I remembered that I had some saved "Preferences" files.
Went to Options menu and selected "Open Preference file" and selected a previous file date and Hey Presto we're all back.
Maybe taking this route may help others who stumble upon an unknown problem.

Many thanks to all those who took the time to investigate my problem and to providing many suggestions


BIAB 2017 Everything, RB 2017
Lenovo All-in-One. i5, 8gb Ram, 1 TB SHDD, Windows 10
Presonus AudioBox,Studio One 3, Behringer Xenyx302,
M-Audio Axiom 61, Samson Graphite 49.
Lenove Flex 15, i3,Windows 10