I was using version 4 successfully and yesterday installed 5.0.30
After filling in all the parts of a new blog I realised there was no section for Publishing or Saving for later.
I looked at the tutorial and found this section is now at the bottom of the editor - but in my case there is nothing at the bottom of the editor and hence no way to publish the post.
The problem occurs with Chrome Version 46.0.2490.86 m but IE 11 works perfectly. Maybe this is a clue.
Regards,
Peter