You can download modern versions from the official page: https://www.oracle.com/tools/downloads/sqldev-downloads.html
Right-click the downloaded sqldeveloper-3.2.20.10.xx-no-jre.zip file. Oracle Sql Developer 3.2.20.10 Download
Requires Java SE Development Kit (JDK) 6 Update 35 or higher or JDK 7 . (Note: A standard Runtime Environment/JRE is usually insufficient; the full JDK is required for debugging features). Memory: Minimum 1 GB RAM (2 GB recommended). Disk Space: Approximately 110 MB for the archive extract. You can download modern versions from the official
Introduced support for managing Oracle Application Express (APEX) Listener installations. Enhanced Tools: Included significant improvements to the Database Diff Data Handling: Memory: Minimum 1 GB RAM (2 GB recommended)
Version 3.2 relies on Java Swing frameworks that do not understand modern 4K or High-DPI scaling, resulting in illegible, tiny user interface text. Right-click sqldeveloper.exe and select Properties . Navigate to the Compatibility tab. Click Change high DPI settings .