Sample files in Trados Studio 2014

Hi,

After upgrading from Trados Studio 2011 to 2014, I tried working with the sample files but at some point I started receiving an error message saying that the file cannot be opened as it contains languages that are not configured for this installation.” The languages I selected at installation are EN-US, EN-UK, EN-CA, FR-FR and FR-CA so I don’t see why there would be a conflict with translating the sample files from EN-US to FR-FR. 

Is there a way to reinstall the sample files from scratch so I can start over in case I messed them up by mistake when I first started working with them?

Or is there another way to make the error message disappear so I can work with the sample files?

Any help or suggestion would be most appreciated.