I'll have a look at the hidden files, that's an interesting thought that they might be moved.
It seems logical that at the point of removing partitions, I missed a step. The manager of C-usa thought there was an option at bottom right of the screen, but its wording was not specific.
At one stage about there, I noticed the very icon that seemed logical, was gray'ed out. I guess I'll have to wait until I get to the full installation to find out.
Since this is all a learning exercise, I felt tempted to scrub it and start again, but there are still some issues that are more important. But...I promised not to drift.