Of course we highly recommend version 10 to all users who can upgrade. For those who cannot, or who want to follow the history of the new versions, we offer:

Highlights of the new features in each release with links to each descriptions and summaries.

Free downloadable upgrades within each version (highly recommended):

• Users with version 9 -- upgrade to 9.6.5
• Users with version 8 -- upgrade to 8.4.7
• Users with version 7 -- upgrade to 7.4.2
• Users with version 6 -- upgrade to 6.9.2