Windows Explorer display

[MP]

I've been using Windows Explorer for a long time and all of a sudden,
when it opens it is not the way I set it. the My Documents folder is
'open' showing all the folders below. I prefer having this folder
'closed'. But if I close it and close Explorer and then reopen, it's
back to being open.

Also, I used to be able to single click on a folder on the right and
have it display all the folders below. Instead now, I have to click on
the plus sign AND then double click on the folder name.

What has happened to change this. I can't find any settings.

Thanks,
MP