How do I get rounded corners, the original theme style, another theme style?

Before proceeding... Be sure to export your settings file as explained below before trying other styles so you can get yourself back to where you started.

On a new installation of Atahualpa a "style" is used which for some may be just fine but you should check out the other available "styles" to see which might be a good starting point for you site. You can both export a style so you can import on another site with the same version of Atahualpa and you can import styles as well.

Exports and Imports are both done from ATO>Export/Import Settings. You can import one of the included styles by doing the following:

1. Download the Atahualpa Theme from wordpress.bytesforall.com if you haven't done so already
2. Unzip the theme
3. Go to ATO>Export/Import Setting and click on Upload & Import Atahualpa Settings file
4. Navigate to the styles folder which is in the zip file you just unzipped
5. Select one of the theme styles and import

Try them all and also remember to periodically export your settings as you work on a site as a backup of the setting along with a regular backup of the database.