When the uploading is complete open your Magento administration panel and go to System > Design Section.

When the uploading is complete open your Magento administration panel and go to System > Design Section.

 

 

 

At the appeared screen click Add New theme button in the top right corner.

 

In the Custom design field select your newly installed theme.

 

 

Click Save button to apply changes.

Feel free to check the detailed video tutorial on how to install Magento theme