Proper Uninstall or deactivate

How to uninstall this plugin?

I have tried this plugin for 3 weeks, with some uploaded files and now plannig to deactivate this plugin, but sadly now all my images were uploaded in past 3 weeks are broken. Meaning my Images are still in s3 but always need this plugin to load. How to solve this?

https://www.ads-software.com/plugins/amazon-s3-and-cloudfront/