Don't stress mate, everything is still there under your account
Here is what you're currently seeing...It's called "Modern View"
Just Click on "Classic View" as shown here:
And here is the old "Classic" format which you are used to (and so am I)
Finally, if you want to retrieve image codes in "Modern View" just click on "i" button (first at the top) right next to each image and you'll get the codes displayed like this:
Hope this helps.
P.S. Marc: You may want to add this to the photos posting guide on the forum for future reference.