Nope, works fine for me. Could be a corrupt download (unless you're using the GOG downloader; browsers have a habit of not finishing the data transfer, usually due to unstable connection, and no errors come up if they do this).

I am using the GOG Downloader. I suppose I should try to redownload it again

I've tried to reinstall it several times now and it still doesn't work. Besides YnK is anyone else having problems with this?

I played it a few months back and had no issues with the software installation. This is one I would contact support about, if you haven't already.