There are two Carbon theme packages: CSS and SCSS.
CSS only package includes pre-compiled CSS file and images folder.
SCSS package includes all SCSS source files required for easy customization of any theme element. Purchasing this package offers you the possibility of modification Carbon default appearance.
# Installation Steps
1. Extract the Carbon package zip file.
2. Remove ext-all.css stylesheet from you Ext application page.
3. Include carbon.css stylesheet in your Ext application page.
4. Refresh your browser.
Folder structure inside the package is the same as in the Ext JS 4 package, so it's allowed to extract the package directly to ext/resources folder.