If Store Commander was not automatically added to the Modules menu in PrestaShop backoffice, follow the below instructions to insert it in the list.
From the backoffice PrestaShop > Administration > Menus > Add new
Enter the following data & save
Nom : Store Commander
Classe = AdminStoreCommander
Module : storecommander
Etat : activé
Parent : Modules
Store Commander is now listed under the Modules menu: