The license for this installation could not be validated

The license for this installation of Checkbox® Survey was not properly activated.  This could be because the license file was copied from another machine, or because the license was not activated during the activation grace period.  Alternatively this error occurs if the license file has been corrupted.  The most likely cause of corruption are indexing services or virus scanners. 
To resolve this issue please download a clean copy of your license file from the customer area of the Prezza Website.  Once you have activated this license make sure to remove all write permissions and set the Read-only flag.