Hello Frank,
Got it.
It is installed!
I noticed a problem which is totally my bad. There was an issue with the character encoding for the twcsl code and so the code you downloaded is slightly corrupted causing code not to work as expected. We need to get you a good copy. I have corrected the issue for the encoding but the file is on a CDN ( content delivery network ) so it may take awhile before the CDN refreshes the file.
In the meantime I'd like to direct message you a good version of the code that you can reinstall. It that OK with you?
Once we get this sorted then I can move onto getting you some CSS to control the background colors of categories.