I use Sentinental keys to protect my software. Old keys is now not fully supported by its manufacturer. I am forced to use some old third party software to provide compatibility. This affects performance speed and reliability of my software. So I decide to transit to new platform. Some time I would support two versions. Users, having new keys, may use Oasis-Poker Pro 2. Users, having old keys, should use Oasis Poker Pro. Everyone may change old key for new one at any time. This is free of charge. You only should pay for delivery.