Stores customized themes for putty. One can apply the theme by running the .reg files and then selecting the theme while creating a new session.
These themes are taken from various sites. Reference to website is given in registry file itself.
Details about the working of theme and how to apply it can be found at https://rahulait.wordpress.com/2015/04/27/customizing-putty-themes/
More themes can be found at:- http://putty.org.ru/themes/index.html