Hey.
Make sure you've followed the install instructions carefully:
https://wonderfulwhims.com/installation/
If it still doesn't work, let me know what's your version of the game.
Send a screenshot of your WondefulWhimsMod folder, I'll check if you've installed it properly!
You can send it here, or through email: https://wonderfulwhims.com/contact/
Yeah you need to extract the files from the archive which really is as simple as step 3 GIF makes it out to be: https://wonderfulwhims.com/installation/
You simply drag the folder named WonderfulWhimsMod from one window to the one with your Mods folder opened. It's that easy!
