Thanks for your continuing interest.
Nope, I've not found a reasonable and acceptable solution and, to be honest, I've pretty much given up on trying.
I checked out most of the solutions suggested in this thread but, after due consideration and consultation with 'head office' (the wife!), it was deemed that nothing was suitable.
See, it's all about how complicated a program is and how long it takes to learn to use it.
The wife parks herself in front of her machine for maybe only 2 or 3 hours a week so she's unwilling to spend much of that time learning the ins and outs of new software.
Also, she may not even touch her machine for weeks at a time so anything she has bothered to learn (say hot-key combos) may well be forgotten, at least partially, by the next session.
That's the beauty of Opera Notes and why I offered same as an example - quick, simple and there looking at you from context menu. Granted, of course, that Opera Notes is perhaps too limited in scope for what you are or I may require but something similar, available in Windows Explorer, would be absolutely ideal for my better half.