Wordpress plugin content box?

When we add new wordpress post, beside content, there is a section called excerpt where we add summary of the post
How do I made so that the wordpress content box on flynax show this excerpt instead on content?
Please see screenshot
Attachment 3974

The bottom post show code because that post was built with divi builder. :(((
I have raised this before and Alan help me by making the below change in the file rlWordpressBridge.class.php

from

Code:

---

Only registered members can view the code.

---

to

Code:

---

Only registered members can view the code.

---

But for some reason it's not working anymore.
Can anyone update this method?