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Request an Upgrade Coupon

If you have purchased a license to Modbus Poll or Modbus Slave version 3.x, you are entitled to a discount on version 4.x.

We will give you a credit for 100% of what you paid for version 3.x since January 1, 2006.  We will credit 65% of any amount you paid on or before December 31, 2005.  You can use the credit once -- while ordering a version 4 license of any size.

Email us your proof of purchase, and we will send you an Upgrade Coupon that you can use when ordering version 4.x.  We will research your account and email your upgrade credit code back to you within 24hours.

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