Do I need to use Slider Revolution plugin if I am using Default Pro demo?

I installed the Default Pro demo, I moved around some elements.
The only real change is that I changed the background of the footer section.

When I hit plugins (on the newspaper menu item), it is listed as optional.

I deactivated the plugin and I hit the refresh button on my browser, nothing happened on the front side of my browser.

Currently it is 6.6.12 and ther is a high vulnerability according to Wordfence: https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/revslider/slider-revolution-6612-authenticated-administrator-arbitrary-file-upload

So since it didn’t ruin my site when I deactivated it. I can delete it right?

6.6.13 is patched.

So how do I update it? I am going to delete off my system until Newspaper updates it to 6.6.13.