I have a project connected to SVN and I try to upgrade it to 6.1 but I'm getting the following Error all the time. I have tried importing the project with 6.1 studio, or opening it with 6.0.0 and then upgrading and I'm still getting the same error:
[2014-02-04 15:15:50] FWLST1022I: Starting to migrate the Assessor project from version 6.0.0 to version 6.1.0.0.
[2014-02-04 15:15:50] FWLPL0025I: The Assessor project is being saved as C:\work\code\mobile\AssesoriPhone\Assessor\Assessor_2014_02_04_151550.backup.zip file.
[2014-02-04 15:16:14] FWLPL0019E: Migrating the Assessor project from version 6.0.0 to version 6.1.0.0 has failed because this migration path is not supported:
Failed reading application-descriptor.xml
and the icon of the project change to 
I'm using Eclipse Java EE IDE for Web Developers.
Version: Juno Service Release 2 Build id: 20130225-0426