There's a possibility the file(s) you dwnlded were corrupted from the source. There's plenty out there & there's even some sources that seem to share a large no. of corrupted files. Try dwnlding from a different source. Besides, I'd suggest any app that's missing files is not worth bothering with. That means they've been tampered with (perhaps to its peril.) Either or both the files were corrupted or you're treating them inappropriately such as using the correct utility to deal with them. And yes there should be some kind of instructions with it (Morgwen: a READ ME which explains exactly what to do.)