If it's a demo, that should be mentioned in the name of the game or files or version number.
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I am sorry, oxpuppy forgot to rename the file to clearly indicate that it is a demo. However, we would also like to remind you that we are not obligated to clearly indicate the version of the game within the file's name. We will try to do so in the future, but no promises can be made here, as we can simply forget to name it properly, due to us being busy or due to us working on the game.