3.1EA3 Can not create first connection on a virginal installation.

Question

To test a clean installation I
1) unzipped the download package (sqldeveloper-3.1.06.82.zip of 203Mb, so including the JDK) in a separate folder
2) removed folders "SQL Developer" and "Oracle SQL developer Data Modeler" from my C:\Documents and Settings\<username>\Application Data\
On the first startup there is (as expected) no proposal to migrate any settings.
Opening "New" (by either using the button, ctrl+N or menu File/New) opens the "Create a new" dialog.
There I select the first item: "Database connection" and click OK.
The "New Gallery" window opens.
When either selecting "Database Tier" or "General/Connections" in the tree, the option "Database Connection" is available. It describes how it should "Opens the Create Database Connection dialog". But when I click OK, nothing happens (apart from breefly changing my mouse cursor)... :-(
On the other hand an other option (Subversion Repository Connection) works fine: selecting it and then clicking OK yields a "Create Subversion Connection" dialog as expected.
After restarting SQL Developer the same behaviour remains (also see PS below)
By now I also tried the "All Items" option in the "New Gallery" tree. This lists two kinds of database connections:
Database Connection (Database Tier)
Database Connection (Connections)
When I try the first option (Tier) I again get no dialog.
When I try the first option (Connections) I also get no dialog.
In short I can't make any connections.
Some more info.
By mistake, i just started up my 3.0 version, but before restoring my C:\Documents and Settings\<username>\Application Data\ folders.
After having dismissed the migrate dialog (I suppose it saw the files created by the 3.1), the screen looked different from the 3.1 in an important way:
The 3.0 has the gray screen with the slanted list of buttons on the right, but on the left it also has the treeview (showing an empty list of connections).
The 3.1 version has the same grey window, but that is all: there is no treeview on the left...
PS.
When opening SQL Developer the second time, the following error appeared in the logging page, but I concidder this to be irrelevant (since I don't use TimesTen)
SEVERE     86     0          Failed to create addin oracle.dbtools.raptor.timesten.TTAddin
On a third invocation this error did not appear again (the logging page was still open, but empty).
Edited by: JVdB on 5-jan-2012 1:08 Added the part about the difference between 3.0 and 3.1: the lack of the treeview window on startup

Answer 1

Well, I (still) can't find any of those "Quite some threads" :-)
Anyway.
I'm running on windows XP SP3 (yes...)
The windows is English, the regional settings used are
Standards and formats: English (United Kingdom)
Customize regional options:
Numbers-tab
- Decimal symbol: . (dot)
- Digits after decimal: 2
- Digit grouping symbol: <null>
- Negative symbol: -
- Negative number format -1.1
- Display leading zeros: 0.7
- List separator: . (dot)
- Measurement system: Metric
Currency-tab
- Currency symbol € (euro sign)
- Positive currency format: €1.1
- Negative: -€1.1
- Decimal: . (dot)
- Digits: 2
- digit grouping symbol: . (dot)
- digit grouping: 123.456.789
Time-tab:
- Time format: h:mm:ss tt
- Time separator: : (colon)
- AM: AM
- PM: PM
Date-tab:
- Two digit year: 1930 - 2029
- Short date format: dd/MM/yyyy
- Date separator: /
- Long date format: dd MMMM yyyy
Location: Belgium
I added the proposed line in ...\sqldeveloper\bin\sqldeveloper.conf on a line between the existing lines
AddVMOption -Doracle.jdbc.mapDateToTimestamp=false
and
IncludeConfFile sqldeveloper-nondebug.conf
This has not helped.
I also tried with "UK" instead of "US", but still no luck...
Thanks for your help.
Edited by: JVdB on 9-jan-2012 6:40: added the results of adding the extra option in the .conf file.