According to the information found in this link, InTouch 10(not exactly 10.1 but yeah) works fine in Windows 8.1 but I could not find any other information about the compatibility of InTouch 10.1 in Windows 8.1. I think you will be okay but some features may not work properly, of course.
So, use it on your own risk and be careful. Ah, additionally, do not forget to try to change the compatibility mode if you have any problems with compatibility.