Last month we reported an issue affecting Stitchmastery users who had update to High Sierra 10.13 AND had the primary language of their machine set to something other than English.
We are now happy to report that this issue has now been fixed by Apple. If you update to High Sierra 10.13.1 you should find that you can set your primary language to something other than English and the Stitchmastery menus will now work. Yay!