For all those who want to keep their PMs
If you have scads of PMs and don't wish to delete them you can save them all to your computer.
Go "settings at top of page. Scroll down and on left hand side you will see Inbox. Click this then the little box at the top. That will click all the posts on that page. Now scroll to the bottom of your list where it says "selected messages"
Click on this and you will get a drop down menu. Choose Download as text. All you have to do is decide where you want to save them. Hope some of you will find this helpful.