Hi – and welcome to the forums!
If you click on the “Download the installer” link as shown above, you can download an ".appinstaller’ file. App Installer is a standard Microsoft technology to distribute apps that offers many features, most importantly seamless upgrades, which is paramount for a rapidly developing app with bi-weekly releases like Shapr3D. It’s independent from the Microsoft Store – you don’t need a Store account for it to work, nor install the Store itself. We tested it in a number of ways (including things like forcibly blocking Store access on the network) to make sure that is the case. The only potential issue can be is that if you have App Installer manually uninstalled (it gets installed for all but the most stripped-down/restricted versions of Windows), it’s tricky to install it again without the Store. Let me know if that’s the case for you or you can’t get it work so that we can figure out and fix the problem.
We don’t want to push anyone to use the Store if they don’t want to use it – but based on what we’ve seen so far, it works better than a standalone executable for most people. It takes care of things like install permissions, background upgrades that honor your network settings, network access issues, faster peer-to-peer distribution of files, problems with anti-virus and malware scanners and many more. Many centralized endpoint management systems can also pull software from it seamlessly. But we understand that it’s not a good choice for many, and that’s why we have the standalone package.