Found a Workaround to convert the main headings of a Workflowy session rundown into an EdrawMind Mindmap: Make use of Markdown

 STEPS: 

1. In Workflowy, collapse a rundown to the levels which I want to show on a mindmap. 

2. Copy and paste this list into Dynalist

3. In Dynalist, copy this back to Workflowy

4. Export as a Markdown file

4. In EdrawMind, under FILE, import this Markdown file. 

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KEY TAKEAWAY

- Unlike Xmind and Mindmeister, a mind map thus created in Edrawmind can start with the top node.