pgosl,
You have choices. Stay with Version 9, Install Version 11, or come up to Version 2008.
I would suggest that since you have Version 11, just to install it and it will open your Version 9 Family
File and start from there.
There are a lot of changes in 2008 from Version 9.
After you get back into your research, with Version 11, then you can consider updating to a newer verrsion.
Just Install Version 11 and then open your existing Family
File.
Its always a good idea to have a Back Up of your family file, which you have on the DVD.
Russ