I think this is my first suggestion for the player, and not the editor

The way we load quests into ZC has been in place for so long, yet it's never changed, and to the first-time user, it's not all that obvious. Plus, ZC now revolves around the custom quests, and not the original games. So, my suggestion is; When you start a new file, a window pops up asking if you want to load a custom quest. Clicking Yes will open up the file-select window so you can choose the quest you want, and clicking No will start a default file as usual