Thanks, theducks !
Easy when you know how, can't understand why people have such a lot of trouble finding things ...........

Herrumph ..............
Yes, well, moving swiftly on....
(I 'fess up - found it by accident on Control Panel, which is where I then realised I should have looked in't fust place ! Bloody fool ...)
Anyway, that's sorted, now all I have to do is wait for Amazon to work out why my K4PC won't open . It seems I have them stumped at the moment.
I have been guided through the uninstall old/install new version 4 times now by them,[2 Helpers from Far East, one from US, and the last from Eire - which at least was a good crack, & pleasant chat! ) and each time it opens fine - until I buy/acquire a new book for K4PC. Then it reverts to not opening again ....
I can see it in my account library, I can "Send To My K4PC", it tels me it has been delivered .... and, lo and behold, I cannot open the thing again.
I wait with bated breath.
The mighty Amazon machine grinds into active action.
Hopefully.