I wonder if the sentence "You can use your diagrams in any way you like." actually covers adding those to documents delivered to our customer, such as workshop reports.
Thanks in advance for your answer, and thanks a lot for bringing yEd to us ;-)
Yes, you are allowed to ship the documents you created with yEd to your customers. (You are not allowed to ship the yEd application to your customers, though.)
"You can use your diagrams in any way you like" really means in any way.