SQL Developer

Hi, I upgraded SQL developer yesterday to the latest version. Now I don't see anything any more in the datagrid, columns, constraints, etc ...
Connection is OK, in the explorer (to the left) I see tables and columns, in the datagrid (table properties) I don't see anything.

Here is the contents of the about box

Many thanks

About
-----

Oracle SQL Developer 2.1.1.64
Version 2.1.1.64
Build MAIN-64.45
Copyright © 2005,2009 Oracle. All Rights Reserved.
IDE Version: 11.1.1.2.36.55.30
Product ID: oracle.sqldeveloper
Product Version: 11.1.1.64.45

Version
-------

Component Version
========= =======
Java(TM) Platform 1.6.0_20
Oracle IDE 2.1.1.64.45
Versioning Support 2.1.1.64.45

Properties
----------

Name Value
==== =====
awt.toolkit sun.awt.windows.WToolkit
class.load.environment oracle.ide.boot.IdeClassLoadEnvironment
class.load.log.level CONFIG
class.transfer delegate
file.encoding Cp1252
file.encoding.pkg sun.io
file.separator \
ice.browser.forcegc false
ice.pilots.html4.ignoreNonGenericFonts true
ice.pilots.html4.tileOptThreshold 0
ide.AssertTracingDisabled true
ide.bootstrap.start 8627304444140
ide.build MAIN-64.45
ide.conf C:\sqldeveloper\sqldeveloper\bin\sqldeveloper.conf
ide.config_pathname C:\sqldeveloper\sqldeveloper\bin\sqldeveloper.conf
ide.debugbuild false
ide.devbuild false
ide.extension.search.path sqldeveloper/extensions:jdev/extensions:ide/extensions
ide.firstrun true
ide.java.minversion 1.6.0_04
ide.launcherProcessId 5928
ide.main.class oracle.ide.boot.IdeLauncher
ide.patches.dir ide/lib/patches
ide.pref.dir C:\Users\johkene\AppData\Roaming\SQL Developer
ide.pref.dir.base C:\Users\johkene\AppData\Roaming
ide.product oracle.sqldeveloper
ide.shell.enableFileTypeAssociation C:\sqldeveloper\sqldeveloper.exe
ide.splash.screen splash.gif
ide.startingArg0 C:\sqldeveloper\sqldeveloper.exe
ide.startingcwd C:\sqldeveloper
ide.user.dir C:\Users\johkene\AppData\Roaming\SQL Developer
ide.user.dir.var IDE_USER_DIR
ide.work.dir C:\Users\johkene\Documents\SQL Developer
ide.work.dir.base C:\Users\johkene\Documents
java.awt.graphicsenv sun.awt.Win32GraphicsEnvironment
java.awt.printerjob sun.awt.windows.WPrinterJob
java.class.path ..\..\ide\lib\ide-boot.jar
java.class.version 50.0
java.endorsed.dirs C:\Program Files\Java\jdk1.6.0_20\jre\lib\endorsed
java.ext.dirs C:\Program Files\Java\jdk1.6.0_20\jre\lib\ext;C:\Windows\Sun\Java\lib\ext
java.home C:\Program Files\Java\jdk1.6.0_20\jre
java.io.tmpdir C:\Users\johkene\AppData\Local\Temp\
java.library.path C:\sqldeveloper;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\oraclexe\app\oracle\product\10.2.0\server\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files\NTRU Cryptosystems\NTRU TCG Software Stack\bin\;C:\Program Files\Wave Systems Corp\Gemalto\Access Client\v5\;C:\Program Files\Gemplus\GemSafe Libraries\BIN;C:\Program Files\Common Files\Roxio Shared\DLLShared\;C:\Program Files\Common Files\Roxio Shared\9.0\DLLShared\;C:\Sybase\DLL;C:\Sybase\BIN;C:\Program Files\Sybase\Shared\PowerBuilder\;C:\Program Files\Java\jdk1.6.0_12\bin;C:\apache-maven-2.0.10\bin;C:\Program Files\Liquid Technologies\Liquid XML Studio 2009\XmlDataBinder7\Redist7\cpp\win32\bin;C:\PROGRA~1\ATT\Graphviz\bin;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Belgium Identity Card;C:\Program Files\Common Files\Adobe\AGL;C:\Program Files\Research In Motion\BlackBerry Theme Studio 5.0\bin;C:\Program Files\CVSNT\
java.naming.factory.initial oracle.javatools.jndi.LocalInitialContextFactory
java.runtime.name Java(TM) SE Runtime Environment
java.runtime.version 1.6.0_20-b02
java.specification.name Java Platform API Specification
java.specification.vendor Sun Microsystems Inc.
java.specification.version 1.6
java.util.logging.config.file logging.conf
java.vendor Sun Microsystems Inc.
java.vendor.url http://java.sun.com/
java.vendor.url.bug http://java.sun.com/cgi-bin/bugreport.cgi
java.version 1.6.0_20
java.vm.info mixed mode, sharing
java.vm.name Java HotSpot(TM) Client VM
java.vm.specification.name Java Virtual Machine Specification
java.vm.specification.vendor Sun Microsystems Inc.
java.vm.specification.version 1.0
java.vm.vendor Sun Microsystems Inc.
java.vm.version 16.3-b01
jdbc.library /C:/sqldeveloper/jdbc/lib/ojdbc5.jar
line.separator \r\n
oracle.home C:\sqldeveloper
oracle.ide.util.AddinPolicyUtils.OVERRIDE_FLAG true
oracle.jdbc.Trace true
oracle.translated.locales de,es,fr,it,ja,ko,pt_BR,zh_CN,zh_TW
oracle.xdkjava.compatibility.version 9.0.4
orai18n.library /C:/sqldeveloper/jlib/orai18n.jar
os.arch x86
os.name Windows Vista
os.version 6.0
path.separator ;
reserved_filenames con,aux,prn,lpt1,lpt2,lpt3,lpt4,lpt5,lpt6,lpt7,lpt8,lpt9,com1,com2,com3,com4,com5,com6,com7,com8,com9,conin$,conout,conout$
sqldev.debug false
sun.arch.data.model 32
sun.boot.class.path C:\Program Files\Java\jdk1.6.0_20\jre\lib\resources.jar;C:\Program Files\Java\jdk1.6.0_20\jre\lib\rt.jar;C:\Program Files\Java\jdk1.6.0_20\jre\lib\sunrsasign.jar;C:\Program Files\Java\jdk1.6.0_20\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.6.0_20\jre\lib\jce.jar;C:\Program Files\Java\jdk1.6.0_20\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.6.0_20\jre\classes
sun.boot.library.path C:\Program Files\Java\jdk1.6.0_20\jre\bin
sun.cpu.endian little
sun.cpu.isalist pentium_pro+mmx pentium_pro pentium+mmx pentium i486 i386 i86
sun.desktop windows
sun.io.unicode.encoding UnicodeLittle
sun.java2d.ddoffscreen false
sun.jnu.encoding Cp1252
sun.management.compiler HotSpot Client Compiler
sun.os.patch.level Service Pack 2
svnkit.sax.useDefault true
user.country BE
user.dir C:\sqldeveloper\sqldeveloper\bin
user.home C:\Users\johkene
user.language nl
user.name JOHKENE
user.timezone Europe/Paris
user.variant
windows.shell.font.languages

Extensions
----------

Name Identifier Version Status
==== ========== ======= ======
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Code Editor oracle.ide.ceditor 11.1.1.2.36.55.30 Loaded
Database Connection Support oracle.jdeveloper.db.connection 11.1.1.2.36.55.30 Loaded
Database Object Explorers oracle.ide.db.explorer 11.1.1.2.36.55.30 Loaded
Database UI oracle.ide.db 11.1.1.2.36.55.30 Loaded
Diff/Merge oracle.ide.diffmerge 11.1.1.2.36.55.30 Loaded
Extended IDE Platform oracle.javacore 11.1.1.2.36.55.30 Loaded
External Tools oracle.ide.externaltools 11.1.1.2.36.55.30 Loaded
File Support oracle.ide.files 11.1.1.2.36.55.30 Loaded
File System Navigator oracle.sqldeveloper.filenavigator 11.1.1.64.45 Loaded
Help System oracle.ide.help 11.1.1.2.36.55.30 Loaded
History Support oracle.jdeveloper.history 11.1.1.2.36.55.30 Loaded
Import/Export Support oracle.ide.importexport 11.1.1.2.36.55.30 Loaded
Index Migrator support oracle.ideimpl.indexing-migrator 11.1.1.2.36.55.30 Loaded
JDeveloper Runner oracle.jdeveloper.runner 11.1.1.2.36.55.30 Loaded
Log Window oracle.ide.log 11.1.1.2.36.55.30 Loaded
Mac OS X Adapter oracle.ideimpl.apple 11.1.1.2.36.55.30 Loaded
Navigator oracle.ide.navigator 11.1.1.2.36.55.30 Loaded
Object Gallery oracle.ide.gallery 11.1.1.2.36.55.30 Loaded
Object Viewer oracle.sqldeveloper.oviewer 11.1.1.64.45 Loaded
Oracle Data Modeler Reports oracle.sqldeveloper.datamodeler_reports 11.1.1.64.45 Loaded
Oracle Database Browser oracle.sqldeveloper.thirdparty.browsers 11.1.1.64.45 Loaded
Oracle IDE oracle.ide 11.1.1.2.36.55.30 Loaded
Oracle SQL Developer oracle.sqldeveloper 11.1.1.64.45 Loaded
Oracle SQL Developer Data Modeler Viewer oracle.datamodeler 2.0.0.584 Loaded
Oracle SQL Developer Extras oracle.sqldeveloper.extras 1.1.1.64.45 Loaded
Oracle SQL Developer Migrations oracle.sqldeveloper.migration 11.1.1.64.45 Loaded
Oracle SQL Developer Migrations - Antlr3 Translation Core oracle.sqldeveloper.migration.translation.core_antlr3 11.1.1.64.45 Loaded
Oracle SQL Developer Migrations - DB2 oracle.sqldeveloper.migration.db2 11.1.1.64.45 Loaded
Oracle SQL Developer Migrations - Microsoft Access oracle.sqldeveloper.migration.msaccess 11.1.1.64.45 Loaded
Oracle SQL Developer Migrations - MySQL oracle.sqldeveloper.migration.mysql 11.1.1.64.45 Loaded
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Oracle SQL Developer Migrations - Translation Core oracle.sqldeveloper.migration.translation.core 11.1.1.64.45 Loaded
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PROBE Debugger oracle.jdeveloper.db.debug.probe 11.1.1.2.36.55.30 Loaded
Peek oracle.ide.peek 11.1.1.2.36.55.30 Loaded
Persistent Storage oracle.ide.persistence 11.1.1.2.36.55.30 Loaded
QuickDiff oracle.ide.quickdiff 11.1.1.2.36.55.30 Loaded
Replace With oracle.ide.replace 11.1.1.2.36.55.30 Loaded
Runner oracle.ide.runner 11.1.1.2.36.55.30 Loaded
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Sql Monitoring Project oracle.sqldeveloper.sqlmonitor 11.1.1.64.45 Loaded
Tuning oracle.sqldeveloper.tuning 11.1.1.64.45 Loaded
User Extensions Support oracle.sqldeveloper.userextensions 11.1.1.64.45 Loaded
VHV oracle.ide.vhv 11.1.1.2.36.55.30 Loaded
Versioning Support oracle.jdeveloper.vcs 11.1.1.2.36.55.30 Loaded
Versioning Support for Subversion oracle.jdeveloper.subversion 11.1.1.2.36.55.30 Loaded
Virtual File System oracle.ide.vfs 11.1.1.2.36.55.30 Loaded
Web Browser and Proxy oracle.ide.webbrowser 11.1.1.2.36.55.30 Loaded
oracle.ide.indexing oracle.ide.indexing 11.1.1.2.36.55.30 Loaded