If you purchased (or upgraded to) a copy of Grid Cartographer 4 Professional Edition prior to OCT 31st 2017 then you can claim a free Steam key for your personal use*. Make sure to have your FastSpring order number to hand or use the contact page if you need assistance. Full details here:
* Software won't be available until after the launch date.
NOTE: After this point the web store and the Steam store will continue along as separate entities.
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