Default Non-static Front Page (Home Page) Is Missing (Atahualpa Theme)

Please help,

I'm using Atahualpa and love it, but... the default front page with my most recent posts, which had served as my home page, is gone.

My oldest (welcome) post kept appearing on/as the home page, so I removed the home page from the page menu bar (via the theme options). The old post still appeared on the default front page, so I deleted the post. Then I got the following message on my front page:

Not Found
Sorry, but you are looking for something that isn't here.

It's as if it won't display ANY posts without the original welcome post.

I have temporarily created a static Posts page to serve as the home page, but now what? I'm hoping to find out how to restore the working latest-posts-instead-of-static-page homepage default.

I've searched through the help forums here and via Wordpress without any luck.

Any ideas (please)?

Thanks!

SavvyBaker

Note: I'm not good with HTML and have been making all changes using Settings or the Atahualpa Theme Options.