Hello, probably because the curves are not in the curves layer, anyway to make sure send us the 3dm file to hello@crossbytes3d.com and we'll take a look.
Thank you for your interest in CrossGems, you can check the prices in our web store: www.crossbytes3d.com/store On the other hand I recommend you to download and try the software before you buy it, you can download a trial version from here: www.crossbytes3d.com/download and if you have any questions do not hesitate to write us at hello@crossbytes3d.com and we will help you as soon as possible.