User Feedback :: that version is the one that I must lower?

The md5.txt is for verifying that the download is complete and uncorrupted. Once verified you don't need that file. I'm not sure how it works in Windows or other OS, but in Linux you can check it with the md5sum program. Put both files in the same directory, and from that directory do "md5sum -c dsl-0.9.1.iso.md5.txt". The '-c' option means 'check'.

original here.