To complete a back up you have to save your data from your old program to a gedcom - File, export, entire file, "Save as type" (at the bottom)gedcom( save to USB easy!). Install new program to new computer and open up your usb gedcom. This will install on new computer and new program.
Just in case!!!
My problem that I had, doing a backup from Family Tree maker 2005 to gedcom. Opening up FTM 2011 downloading gedcom to FTM 2011 I had missing files and a lot of media missing. (doesn't tell you what is missing) Attempted several times, with the same results. After a lot of research and trial and error - I downloaded a free Trial of The Master Genealogist. Uploaded my gedcom in master Genealogist, perfect! no files or media missing. I then did a back up to gedcom in the Genealogist, transferred it over to FTM 2011 again perfect. FTM 2011 was dreadful and ended going back to 2005. I have tried several genealogist programs, I just don't like them 2005 is simple and easy. I had just over 15,000 persons at that time, something like 175 persons missing!!! Good Luck, I'm again back in the market looking for another program