I've found a way to get the old editor going.
If you have a page done with the old editor, in the top-right menu choose "Export to Word"
In the new editor, in the top-right menu choose "Import Word document" and choose the same document you exported in the previous step.
After importing the Word document into a page, just delete the contents and start with a blank page - the old editor is still in use.
PS. The link is Word document created by old editor. Worked for me!