Grid
After clicking on the menu item System->Module Creator you will see a grid.
At first the grid will be empty. But once you create at least one module you will see it in here.
From this grid, you can choose to add a new module or edit an existing one.
You are also able to download the module files (if available), the generated module files list and the generated modules uninstall scripts.
For security reasons you cannot delete a created module from this grid.
You have to do it manually.
See the Delete created module page.