rs1n

> So if a port is populated it needs to be connected. I see now. I'll implement a switch as you suggested. Thank you for all your work -- BlueRetro...

I had essentially a similar issue and it was due to a weak battery. In my case, I had a particular controller that would need charging after a few hours...

You need the Microsoft Visual C++ Redistributable runtime package (X86, not X64 -- even if you have a 64-bit system). https://learn.microsoft.com/en-US/cpp/windows/latest-supported-vc-redist?view=msvc-170