By default when Launch-n-Go is installed all keywords or hotkeys are grouped in the 'My LnG' category.
You can create a new category while adding a new keyword or hotkey by selecting 'New Category'. From the category drop down box.
To delete a category and all keywords and hotkeys in it, select File->Delete Category.
To move shortcuts or commands from one category to other select the keyword or hotkey from the Launch-n-Go and change the category and click save.