Searching the forum didn’t answer this for me, but I have stumbled upon the answer and in the hope that it will help others here it is.
Find the draft and click in it. Open the side-bar with Contact Details and select history. It should now be easy to select your draft. Move cursor left onto the thumbnail image of the draft and bottom left is an Open button.
There should also be a “Draft” entry at the left menubar.
If you can’t find it:
- You have to expand the left menu
- you have to expant the account