Resets the WordPress database back to it's defaults. Deletes all customizations and content. Does not modify files only resets the database.
I tried it on WP 4.1.5, thinking it was because of WP version but it crashes as well. Showing error messages in Page section and breaking the pages.
Claims that it will retain credentials, but I was not able to login to the WP admin panel after reset -- tried every variation - my original username, my email, password variations, etc. Wasn't even able to get WP to recognize my email to reset the password.
Furthermore, after contacting DreamHost (web host), they had to go in and manipulate the database just to get me back into WordPress admin, and they mentioned that it broke some things in the database.
I DO NOT recommend this plugin, contact your host or provider if you want to do a reset.
Just a warning for everybody who intends to use this plugin on a multisite. It will definitely break your page as it did on mine.
Maybe it'll be ok on subsites but I don't know. Personally I did it on the main page.