Searching for the "top" version implies you want the latest, most patched, and fully functional release of Designer 6. That would be (or the final service pack released before the transition to the newer JMobile suite).
suggest a "proactive replacement" strategy. Since spare parts for UniOP hardware are becoming scarce and the software is no longer officially supported for modern OS environments, migrating projects to the current JMobile software platform is the most reliable long-term solution. Further Exploration Designer Software Updates page at EXOR Int. S.p.A. for the latest service packs. Review the UniOP User's Manual uniop designer 6 software download top
Disclaimer: This article is for educational and legacy support purposes. Exor, ASEM, and Uniop are registered trademarks of their respective owners. Always use licensed software for production environments. Searching for the "top" version implies you want