Board Thread:Support Requests - Getting Technical/@comment-4439582-20180521132046/@comment-1038387-20180521135104

That's an issue the InfoboxBuilder sometimes has. It's a builder, not an editor, after all. If you want to edit an existing infobox, you have to check the bottom right corner, you'll see a very light grey []. Clicking it takes you to source mode. It's a bit tricky to read because LUA works different from the old codes, but it shouldn't be too difficult to isolate and duplicate/change what you want.