Answer

A key requirement of Q-SYS Designer software is that it requires Windows 7 PRO 64-bit, Windows 8.1 PRO 64-bit, or Windows 10 PRO 64-bit.  By default, the Surface X comes with Windows 10 HOME.

The following is a comment from Microsoft's product page:
Surface Pro X for consumers comes with Windows 10 Home to bring you the powerful Windows features you use most at an exceptional value. If you need additional enterprise management and security tools for the workplace, you can switch to Windows 10 Pro or purchase Surface Pro X for Business. 

However, most pertinently, the product page also adds:
At this time, Surface Pro X will not install 64-bit applications that have not been ported to ARM64, some games and CAD software, and some third-party drivers or anti-virus software. New 64-bit apps are coming to ARM 64 all the time. Detailed information is provided for Windows 10 ARM-based PC app compatibility.

Presently, Q-SYS Designer software has not been ported to the ARM64.