Use SUPER, it can handle pretty much any conversion.
http://www.erightsoft.com/SUPER.htmlThe download process is annoying, and it took me 15 mins to figure out, so here:
1. Scroll all the way down and click "Start Downloading SUPER ©"
2. Scroll down again and click "download and use"
3. Scroll down... yet again... and click "Download SUPER © setup file"