Stitchmastery is available for the following operating systems; Windows (XP, Vista, 7, 9 and 10), macOS (Snow Leopard 10.6 - Mojave 10.14), Linux (tested and officially supported on Ubuntu only).
Note that Stitchmastery will only run on machines that have a 64 bit processor. Machines with 32 bit processors are no longer supported.
Note that the demo and full versions of the software are the same program. The software runs in demo mode with some features locked/limited until activated. In demo mode there is a watermark image on the drawing area. This watermark disappears as soon as the software is activated. Note that, if you have already installed the demo version, there is no need to download and install again. You just need to enter an activation key which you can purchase from www.stitchmastery.com. See Activating Stitchmastery.