I have lost count of how many times I have had to answer "I double-clicked the quest file and Windows said it crashed HELP HELP!@#%" questions in the past two weeks alone.
I think for the Windows installer, or every time you run Zelda Classic, it should automatically associate itself with .qst files in the registry. That way, when someone foolishly opens the quest with Windows, either it will actually work or ZC will bring up a message saying something like this:
When the user clicks the "OK" button, ZC will proceed to run normally. There may also be an "Exit" button to shut down the program right away.WARNING: Never open a quest file outside of Zelda Classic. It is not designed to work this way. Please refer to the readme for instructions on how to play a custom quest. If you wish to edit this quest, please run ZQuest and open it from there.
Many people wonder why you can't just tell Windows to open a quest and have ZC magically load it for them, even if they read the directions. This will prevent such trouble.