JDeveloper 11g supports migration from JDeveloper 10.1.3.4 only. Oracle recommends migrating to JDeveloper 10.1.3.4 from all other earlier versions before migrating to JDeveloper 11.1.1.0.0.
Migrating User Settings
When you start JDeveloper for the first time (and each time after adding a new extension), JDeveloper will prompt to ask whether to migrate your settings from a previous installation. Choose Yes from this dialog to browse to the system directory of your previous installation. This will copy relevant user preferences and settings from the prior release to JDeveloper 11g.
To force JDeveloper to display the migration dialog after the initial start, use the -migrate flag, for example, jdev -migrate
