It is designed to work with the Tray folder, in which your characters and lots are stored, and it also allows you to remove bugged or unwanted CC and extras for a character without a mesh from the game.

This program allows you to extract or import Sims 4 content (houses, lots, characters or rooms) from your library.

You can also use it to remove glitchy clothes, hair, etc. (if you don’t have a mesh)

Allows you to change the images of your creations.Changes in version 1.10.4.3:

[Exporting] Fixed the "elapsed time" that was no longer updating.

Source: synthira.