LCARS Theme Helpers Added After The Install?

Hi. I have HA on a mini PC as the main OS with nothing else on it.

I want to use the HA LCARS Star Trek theme, but when I go to use it on the main UI, it doesn't look right. The header and sidebar look nothing like they are supposed to. The HACS page says you are supposed to create these helpers before installing the theme. I was following a video that made no mention of that, so I didn't do it before downloading and installing the theme. I'm pretty new to HA, so I don't know a lot about the inner working of it. I created the helpers just now, but if the theme is already installed, how do I get it to go back and find and use them? Does it just somehow know to do that? I tried redownloading the theme, but I don't know if that did anything. Here's what it looks like. Below that is the part of the HACS page that talks about it. Any help would be appreciated.