This article details the discounted upgrade eligibility requirements for licenses and serial numbers.
Any eligible serial number for a previous version of Surfer, Grapher, Voxler, Strater, MapViewer, or Didger can be upgraded to the current version at a rate that is discounted from the price of a new license. Upgrade prices can be found on each product's webpage.
To be eligible, the serial number must be registered to the purchaser and must not have been previously upgraded. If you're unsure if your serial number qualifies, please contact Golden Software.
Updated: August 28, 2017