For most developers using butler we recommend avoiding packaging your game into a single file before uploading it. This is because butler needs to access all your game's files in order to generate patches correctly.

Sometimes, though, your entire project actually is a single file, and it doesn't make sense for butler to wrap it in an archive. With the recently added single file support, if you upload a directory that contains just a single file we won't wrap it in an archive. Anyone downloading it from the website will get the original file.

You can follow the single file development in our issues tracker.

Enjoy