Upgrade from SQL 2005 to SQL 2008 R2 Studio Management Fails

I successfully upgraded SQL 2005  Express (32bit) to SQL2008 R2 Express (32bit) for a mini Veeam environment. I then wanted to upgrade Studio Management but got the following error:


Rule "SQL Server 2005 Express tools" failed

The SQL Server 2005 Express Tools are installed. To continue, remove the SQL Server 2005 Express Tools.




First of all I removed the SQL server 2005 remnants from the Programs and Features but that had now affect.

I then removed the registry key:

Go to HKEY_LOCAL_MACHINE -> Software -> Microsoft -> Microsoft SQL Server . Right click "90" and then select delete