Do you have a scroll icon at top-left of the Victoria 4.2 icon in your content pane? If so do you get a dialogue box when you load a fresh copy of V4.2? If you have a scroll on the icon and don't get a dialogue box, hold down the ctrl key (cmd on a Mac) while double-clicking the thumbnail to load V4.2. Once you have the dialogue, make sure Legacy injection Channels are listed and checked.