First navigate to the Pictures tab on the platform and there switch to the Projects tab:
In there you will find that there are various folders (projects) and sub-folders (sets). Please select a subfolder (set) where you would like to put your configurator. If the folder doesn't exist yet, please create it, by adding a new set:
Add a new set
Once you selected the set you would like to place it in then press the + Create button and click on Configurator like so: