Using this editor:
Launch editor and click on 'Open' to locate your savegame.
When you are done press either 'Save'.
Player: Inventory (Add, remove items or change quantity)
Player: Licences (Add, remove licences)
Player: Blueprints (Add, remove blueprints)
Open in internal editor
Open in external editor
Open in external editor: After opening your savegame, press button to open the unpacked savegame in an external editor, such as Notepad++
Open in internal editor: After opening your savegame, press 'open raw' button to open the unpacked savegame in an internal editor.