Need to mention that documentation and support for version 11 might be scarce, as it's outdated. Suggesting to refer to the official support or community forums if available.
SQL Anywhere 11 reached its around 2013, and End of Extended Maintenance by 2018. That means no new security patches.
If you are looking to bring this "classic" piece of history into your own digital landscape, here is the story of how that journey usually unfolds today. The Quest for the Installer In the modern era, SQL Anywhere 11
Connection Timed Out.
, available for a free trial or developer edition through the SAP SQL Anywhere product page The Archive Path