Text Box: Refund Policy Text Box: Concalc 3.1 offers a free demo download with unlimited time for the user to peruse the software. The only difference between the demo version and the full version is: Quantities are locked in the trades section No new projects can be added or deleted. Due to the fact that the product relates to non-tangible software we are unable to provide any refunds once the full version has been bought and downloaded. We would encourage potential buyers to thoroughly test the demo version before you decide to buy. Feel free to contact us for any questions regarding the demo or full version. Should you reside in a area close to our offices we would be more than happy to provide you with a free demonstration of the software.