The project template file is necessary, as the Activation Server sends keys during the product activation process. To send a key, the personal encryption is needed and also the module type definition.
The project template is defined in the activation workflow configuration file with the parameter <ProjectFilename>.
Just use your original project template, which you use in the Licence Generator to generate the license file.
The file must be copied in the folder .\alg on the Activation Server 5. See Upload Configuration Files.