Have upgraded from Premium web designer 16 to 18. Imported site from 16 to 18 go to publish and receive the following failure message "Unable to setup bitmap for rendering. The bitmap requested maybe to big" . Yet the site will publish no problem in version 16. I have optimised all bitmaps. Still failed. Turned retina off on web properties and it up loaded. But this seems to negate an advantage of upgrading. Any help would be useful as I am beginning to think the upgrade was a waste of money.

Kind regards, Keith