They never created a driver for this model and the serial codes changed from the SX-MX12 model that does have a driver. I created a simple serial driver using the other one as a template. It has been trouble free since I installed it. I am very happy with the function and the value.
I installed a Foxun Model:SX-MX12B 8x8 HDBaseT Matrix, Support 18G, HDR, 4K2K@60Hz, YUV 4:4:4.
http://foxun.com/product_detail_1495.html
I wrote a one way serial driver for it and it has worked great. The price is less than 1/5 what you have been quoted.
The Sony Blu-ray Player - Free driver worked great. That driver was running the Sony I replaced. I just swapped out the players, changed the MAC address reservation in the router and everything worked perfect. No driver changes needed.