Problems with CC that I want to edit not showing up.

A while ago I asked the community for help to find get to work skin tones in the studio. Somebody gave me an answer and I'd like to say thank you for your help if you find this because I completely forgot to reply and I don't know how to find the post again but now I have another issue.

A while ago I downloaded CC skins that are for Get to Work so that they could be used for aliens. I deleted this CC because I didn't like it. I have since found another and I wanted to edit it in the studio to prevent Human sims from being able to have them as I wanted them for my occult sims only. However when I go to the category that skins are found in in the studio, the only trace of GTW skins is that of the CC that I deleted. I don't understand why it's still showing up and also why the one that I have downloaded won't show. 

I've replaced the mods folder in the sims 4 studio folder but it still displays the deleted skin cc and doesn't give me the new one and I was wondering if anyone has had this problem and knows how to help me.