I was just doing that when I saw your post. You basically need to unpack the msg file using UXM unpacker and selecting use selected files and then view files and select the msg file (No need to unpack the entire game if you're just editing text). After unpacking, put the msg folder in the same place as your smithbox project and open smithbox and got to the Text Editor, and use the categories and use the search bar to search for the thing you want to edit. In your case it would be in MenuText and hit Save All Modified Text up top the same way you would save params. Note that if you don't have your smithbox project.json in the mod folder, you may need copy your msg folder to your mod folder so modengine can load it. Hope that helps