How can I edit a library

Hello everyone,

I was wondering how I can edit a library. For example, what I wanted to do, was to remove the end screen of the Branching Scenario Library. I'm using Wordpress and I tried to edit files in the following path: /wp-content/uploads/h5p/libraries/H5P.BranchingScenario-1.1/scripts

but none of the changes seem to apply. I then noticed that cached files are created in the path: /wp-content/uploads/h5p/cachedassets

So this could be the reason why I don't see any changes happen. I also cleared the cache but still nothing changed. Is there a right way for me to edit a library?

Thank you in advance