I got the same problem but I managed to communicate the RS232 using .Net as the example in SDK file
If you are using .Net, you can try to set the platform target to x86.
For me (Windows 10 Enterprise, x64), I managed to communicate using RS232 through their software.
I just need to install my RS232 cable driver.
But, yes I agree. It takes me 1 week only to discover how to communicate using the RS232.