How to save blog content directly to first version instead as new draft while using "Save for Later"

Hi,

I'm having EasyBlog version 5.0.32 in my website.
Currently If I open an unpublished blog for editing, it is showing "Save for Later" button in composer.
After clicking on it, the updated content being saved as a new draft.

Is it possible to save the new content directly in the original blog instead as a new draft.
And also please help me understanding difference between Draft and Revision.

-prakash