Weird, I've had that happen to me with one or two Ren'Py games in the past as well, but haven't heard of that happening to anyone with my game yet. Not sure what's causing it, but if there is any way to do so, feel free to proceed; there's no malware so long as you use the link provided on this page.
In the meantime, I'll try to figure out what's going on and see if there's anything I can do to find a solution.