We will only be able to directly convert data from Prevail v8 to Prevail v9. If you are on an older legacy version (earlier than v8), consider upgrading to v8 before the v9 release. If you have an annual support package (premium support using the old lingo) you get both upgrades for free. The only costs incurred may be Advantage Database upgrades and training. If you do not have support, you would have to pay a nominal reinstatement fee plus one year of annual support.
We will be able to convert older legacy versions to v9 for you, but the process may take longer, and there may be some bumps along the way. Also, v8 to v9 upgrades will get priority. Get around this by upgrading to v8 by the end of the year!