April 2020
@Papaya1712Are you on PC or Mac?
Also, are you using the Legacy Edition of Sims 4?
There should be two files inside of your MCCC folder:
mc_cmd_center.package
mc_cmd_center.ts4script
The downloads are compressed (zipped) so of course you'll have to un-zip them before you put them in your Mods folder. The folder path should look like this:
Documents > Electronic Arts > The Sims 4 > Mods > MCCC
Since MC Command Center uses script files you need to enable them in your game. Go into the Game Options screen click the Other tab and check the boxes for "Enable Custom Content and Mods" and "Script Mods Allowed" and Apply Changes. There are additional troubleshooting steps listed at Deaderpool's MCCC website along with a link to their Discord page if you need more help.