This page will help you to remove an installation of a script without deleting files. (for eg. To remove an installation of WordPress without deleting its files just follow the steps given below to you)
1) Click on the Red Icon
2) After clicking on the Red Icon you will be redirected to the page where you can remove an installation.
3) Now the uncheck the Installation Directory, Database and Database User boxes to remove the installation and click on the Remove Installation button to remove the installation.