using the default squarespace builder

Site URL: https://www.wueuniversal.com

i previously installed a template, so my website is built based on that template, how do i revert back to use the default squarespace website builder

If you're on version 7.1, you won't be able to change the template, but it doesn't really matter as you can change your colors and fonts and everything.

If you're on version 7.0, you can find instructions here: https://support.squarespace.com/hc/en-us/articles/205815598-Switching-templates-in-version-7-0