I've used XML Sitemap for several years and never had a problem. Today I added the files as usual and set permissions. When I tried to access the generator url all I receive is a download and the program doesn't start. I re-installed and still have the same problem. Since this is a .mobi site and I wasn't sure that might be a problem, I tried running the free version from the XML Site Generator page and it completed successfully. Any suggestions as to how to fix this?