Thank you Trev,
It didn't quite work as you say. Doing file locations cache gave a path through AppData and I can't even find App Data.
Last time I had anything to do with app data I ended up having to reformat my computer, which is how I lost versionX and now have this version.

When I went to reset preferences the delete cache box was already ticked, so for a moment I thought all was lost, but then I ticked on all the boxes in there to restore everything to default and ended up with a screen full of toolbars, but Harry's path is gone!!

I have always made a separate folder of it's own for each filter and then keep all those folders in one I call "plugins are here" on a pen drive.
This lets me know exactly what I have in there and I've always pointed to each one with no previous trouble, but I will certainly try just pointing to my main folder.
Thanks so much.
Vi