you should copy the files directly and not copy their contents to a text editor before saving as a new file - there is always a risk that you didn'tcopy everything, and an added or missing space or ; or end can make or break the plugin.
Additionally, most plugins require their filename to be exactly as the scripter wrote it - accidentally renaming the js file again can break the plugin (and you have renamed the js file, that is obvious from the console).
Third, you should always check the configuration for the script and NEVER simply "install and forget" - because a lot of plugins will not function correctly (or interfere with other options) if not configured correctly.
I suggest redownloading the file directly (not using a texteditor, but using the download button top right), deleting the plugin as it is now installed, restarting the editor after deleting the plugin and only reinstall the new download after the editor restarted.