Got notice of upgrade to Site Designer and installed. Can't find any release notes anywhere. Would be nice to know what is new/fixed etc. Also nice if it was on download purchases page so can look at before installing. Am I missing where they are located?

Not Yet Been Posted, normally takes a few days to appear in thie Site Designer Thread, Site Designer Change Logs

There is one that I can tell you about,, and that is the introduction of dark/light mode ,, Go to top left menu bar - to 'Actions' then "Preferences ' there you will see the toggle switch to choose which one you prefer.

They have also added a 'No-Index meta-tag which you can select if you wish and a 'No-Follow Meta Tage,, Go to
Page-Manager and scroll down,, you can select it as a global tag (every page that you tick it or individually ) They have also added some titbits of info about page title description lengths etc (guidance only not set in stone)