You may delete your Minder account at any time. Simply open the app, visit your "Preferences" section, then scroll down to find the "Delete Account" option. Deleting your account will delete all your matches, conversations, and profile data.
NOTE: Deleting the Minder app DOES NOT delete your Minder profile. You must follow the instructions above or, if you signed up via facebook, you can also delete your account by following this link: https://www.minderme.co/delete.html
Want to simply hide yourself instead?
Visit your "Preferences" section and turn "Discoverable" to off. This will hide you from the swipe list but keep your matches and conversations alive.