The following error is reported when attempting to add Safeguard Authentication Services (SAS) 5.x license (.dlv file extension) via the Control Center
Failed to add a license
The license file specified is not a valid license
The format of the Authentication Services licenses changed with the release of SAS 5.x
The 4.x licenses have a “.txt” file extension and the 5.x licenses have a “.dlv” file extension
The Authentication Services Control Center version 4.x does not recognise he newer license format
Upgrade to the latest version of Safeguard Authentication Services Control Center and reload the license.
This will recognise the older 4.x type licenses as well as the newer 5.x type licenses.