From Softaculous Wiki
This guide explains how to change the theme from the Softaculous Admin panel
Changing the Theme
- Go to the Softaculous Admin panel
- Go to Settings tab
- Now go to Choose Theme and select the theme from drop down.
- Now click on Edit Settings to save the selected theme.
That's it!! Now your users will get the new theme.
Endusers can customize the theme according to their taste. Here is the guide Customizing_your_Theme