There is the original game (the first choice) which has a lot of Let’s Plays on YouTube.
And there is the Advanced version (the second choice) which has additional content and modifications. One of those modifications is that you will find that short sword in a different location in the cellar. However there is also the modification, that a dagger has a bonus to the attack skill, which means it hits more often (which is really useful in the beginning).
You can see many of the modifications here: https://github.com/Pyrdacor/Ambermoon-Advanced/blob/main/Changes.md