Search notes:

SQL Developer user information directory: SystemV.W.X.Y.Z/o.ide.x.x.x.x.x.x/preferences.xml

Among others(?), this preferences.xml file contains the least recently used file list (tag <lruFiles>)

<?xml version = '1.0' encoding = 'UTF-8'?>
<client-settings class="java.util.HashMap" xmlns="http://xmlns.oracle.com/jdeveloper/110000/client-preferences">
   <Item>
      <Key>editors-options</Key>
      <Value class="oracle.ide.editor.EditorsOptions">
         <editorsData/>
         <lruFiles>
            <Item class="oracle.ide.editor.RecentFile">
               <editor>oracle.ideimpl.editor.DeclarativeEditorAddin-oracle.dbtools.worksheet.editor.Worksheet</editor>
               <explicit>false</explicit>
               <nodeClass>oracle.ide.db.model.SqlNode</nodeClass>
               <nodeURL path="../../../../../foo/bar/baz.sql"/>
               <projectURL path="../o.sqldeveloper/projects/IdeConnections#Ora19.jpr"/>
               <recentTime>0</recentTime>
               <reopen>false</reopen>
               <workspaceURL path="../o.sqldeveloper/projects/Databases.jws"/>
            </Item>
            <Item …>
              …
            </Item>
         </lruFiles>
         <recentFilesShowAll>false</recentFilesShowAll>
         <recentFilesShowClosedOnly>true</recentFilesShowClosedOnly>
      </Value>
   </Item>
</client-settings>

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