While version 1.99.9 is a minor release, the tier includes exclusive features not found in the Free or Pro versions, as detailed on the CrossFTP Features page :
: Added support for ap-east-1 (Hong Kong), eu-south-1 (Milan), af-south-1 (Cape Town), and me-south-1 (Bahrain). CrossFTP Enterprise 1.99.9 Full Version - HaxPC...
: Includes client-side encryption using the AES algorithm to protect files before they are transferred. CrossFTP - FTP and Amazon S3 Client While version 1
: Features a multi-thread "Turbo Engine" that supports up to 40 concurrent transfers to maximize bandwidth usage. af-south-1 (Cape Town)