Please copy all files from the folder “XML Files” to this folder:
Windows 7 (Option 1)
C:\Program Files\Microsoft Office\Document Themes 15\Theme Colors
Windows 7 (Option 2)
C:\Program Files\Microsoft Office 15\root\Document Themes 15
C:\Users\YourUserName\AppData\Roaming\Microsoft\Templates\Document Themes\Theme Colors
If your PowerPoint was running during the process of copying files, it is necessary to completely close and restart it for changes to take effect.