3rd party application code remains on site even after removal in the apps section

[broker]

Hello, I installed the “addthis” application in the control panel to a site at mustread.us - subsequently, I removed the app after trying it.
That was days ago. I’ve cleared the cache at cloudflare, but still note that the site is making a call to the addthis application on pageload.
Is there a way to be certain that any “un-installed” applications are truly uninstalled all the way?

Thank you.

[broker]

To be clear, the application is no longer “running” on the site after removal, i.e. the social buttons are not there any more, but when the page loads, it hangs a little still looking for addthis, as if there’s still some residual code that never got cleaned out on removal…

[sdayman]

I’m not seeing any traces of Addthis. Could it be stuck in your browser’s cache?