I can't imagine converting 10 years of flying from a paper logbook to an electronic logbook. Not only can I not imagine it, I just wouldn't do it. Well, unless you only flew a few times in those 10 years.
However, what I would do is make my first entry in my new electonic logbook and say, "Carried over from Logbook #1, X number of hours.
Then store that logbook in a fire proof safe or bank vault or something, and continue on with my life.