There are TWO folders for custom content in The Sims 4:
This folder is for Lots and Sims
This folder is for other content, recolors, walls, floors, scripts etc
You can create subfolders within the Mods folder to organize your content; if either folder is missing from your The Sims 4 folder then just create one (make sure you check the spelling). If you accidentally delete the Resource file just start your game to get a fresh one!
There are a number of different file types for The Sims 4 custom content, you'll need to place them in the correct folder so they will show up:
Script files must stay inside the zip file they are downloaded in. If your browser automatically unzips downloaded zips you will need to re-zip them before using them.
It is worth noting that we do not have any script files on Parsimonious, nor are we likely to in the future!