You can view a list of Apps that you have installed in the App Marketplace by going into Features > App Marketplace from the builder sidebar.
From there you can access the list of your installed apps by clicking My Apps at the bottom of the App Marketplace menu.
Within the My Apps section you can see a list of all installed apps, and filter by Active and Disabled apps in the side menu.
If you click the Open button it will take you to the relevant dashboard for the app, either within the Bookmark platform or outside of the platform.
If you hover over the three dots a dropdown menu will open, where you can view the App Info, Support information, or Disable the app from your website.
Once the app has been disabled you can re-enable it again at any time by hovering over the three dots and clicking the Enable button.