- Move <sqldeveloper_home>/sqldeveloper/bin/sqldeveloper.conf away so that a new JVM can be selected when SQL developer starts next time.
- All connection configurations are stored in %APPDATA%/SQL Developer/system<sql_dev_ver>/0.jdeveloper.db.connection.<jdev_mod_ver>/connections.xml
- If JDev windows is not visible (mapped outside the screen), then edit MainWindow.x or MainWindow.y property in these files.
%APPDATA%/SQL Developer/system3.0.02.37/o.sqldeveloper.11.1.2.2.37/ide.properties
There could be more than one file in your directory such as
%APPDATA%/SQL Developer/system3.0.04.34/o.sqldeveloper.11.1.2.4.34/ide.properties, so edit the appropriate one.
