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Dongle Emulator, Backup and Recovery

QuestionWe are in need of a replacement in case our original fails. It is from on old Cado Contel Tiger CPS Dos system. The info on it is: Grainbow Centinel Pro CPS NU-30679. Can this be duplicated or are they any old working ones available?
AnswerFor DOS application there's no way to make dongle emulator since they do not use low level drivers so in each case such solution is customized. For DOS software it is required sending us the software. Sentinel CPlus dongle can be emulated rather easy so there must be no problems about it.

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We were looking for a cost effective way to ensure the software we purchased would continue to work. Bill responded quickly and his software was easy to load and works well. I would recommend this to anyone. Now my key is safely put where it cannot be lost or damaged.
Randy from USA