Apparently this happened before on Windows 7.
The author (Shawn) recompiled this using Visual Studio 2008 which solved the problem back then. I suppose it has to be compiled with VS2013 or higher this time.
But Shawn doesn't stop by much anymore.

Just to be clear, I tried the above using the following Kix versions:
4.51, 4.52, 4.53, 4.60, 4.61, 4.64, 4.66, 4.67
And KixForms versions 2.47.5 (latest known version).