Since this is an older version, it is no longer featured on the primary Oracle SQL Developer Downloads page. You can typically find it through the following official channels:
Installing version 3.2.20.10 is a manual process as Oracle does not provide an automated installer for this build. Oracle Forumshttps://forums.oracle.com Where can I get an older version? - Oracle Forums Oracle Sql Developer 3.2.20.10 Download
: Introduced support for managing Oracle Application Express (APEX) Listener installations. Since this is an older version, it is