Here's what happened to me re the new Google+. If it helps someone else, then great.
I posted the following, onto my own Google+ profile page (I thought):_________________________
Can anyone help, please? I thought I'd try out the new Google+ but find it very difficult to use; I tried to change back following the instructions here:http://www.ghacks.net/2015/11/18/how-to-enable-the-new-google-design/
"1. Load https://plus.google.com/u/0/settings
directly to open the Google+ Settings.
2. Locate "can't find the setting you are looking for? Try switching to classic G+" and click on the link.
3. Or, click on this link directly: https://plus.google.com/u/0/settings?gmbpt=true&fd=1
But it didn't work. I still have the new Google+. I have disabilities and this new version is impossible for me. If anyone can help me to get the old Google+ back I'd be very grateful._____________________
I wasn't even able to find a place to type a new post into a community that I manage.
While I was waiting for some kind and knowledgeable soul to reply, I
went back to that community to explore everything down the left-hand side of the page, and at the bottom I found the magic words "Back to the classic Google+".It's at the bottom left of every (I think) G+ pageEDIT: it's at the bottom of your Home page, your Profile page, and the pages of the communities that you joined.
And get this: the new Google+ is so bad that the above post that I thought I'd made on my own profile was instead in my private community. Mehercule! What a load of cr*p!