Can you see the default folders? Is it only folders you created that have gone missing? Look for a small black arrowhead to the left of the folders you can see and click on them. Were they just "nested" under the other folders?
It definitely looks like your folders are there. Can you make sure that you are clicking the arrow next to Inbox and not just the arrow next to My Folders to see if you can see them?
Yes, the folders are there now under the inbox, but, honestly, they weren't there yesterday. Something must have changed. But thank you very much, it's a very big relief to have all those emails back.
Thanks, you are the hero!!