Backup of a website was mistakenly restored. It was not published, so on the publishing server contains correct new data, but in WPB editor the data is old.
Is there any way to get back the new data? e.g. somehow bring it over from the publishing server back to WPB or something?
The only way to restore the required content in editor is to restore snapshot with previous content. WPB does not allow to update content in editor with one from published website. In case you have no required backup, please recreate website from the scratch.