I used to own and use MidiThru by O Deus Audio. The developer died earlier this year and I couldn’t register it on the server. In my search, I found the following;
Does it work on Windows 10?
Yes, Windows XP up to Windows 10, 32 and 64 bit. The download is not yet available. I’ve used their free LoopMIDI in the past. It worked very well.
I’m not quite sure if this is what you are asking - but I have been using LoopBe midi for a number of years with no problems. It works for Windows 10 and has a free version with 1 midi port in/ 1 out and a paid for version with a user selectable number of ports up to 30 ports in/out for about 20 US dollars. They also apparently do an IP version which I have no knowledge.
If this is not the same thing - then I would appreciate if you could tell me the difference for my edification please.
“Windows USB-class-driver for MIDI which almost all of the USB-MIDI-keyboards and -controllers use have a major drawback: only one application can open those ports at the same time. If you are interested in multiple applications to use a single device, you can use proxyMIDI in the middle to provide up to 8 concurrent connections for your applications.” https://www.tobias-erichsen.de/software/proxymidi.html
The programmer of ProxyMIDI has LoopMIDI on his site, which functions the same as LooBe1.
I can’t speak for others, but used live, I had a latency issue with LoopMIDI that I didn’t have with LoopBe. I like to have 2 extra MIDI ports available, so I bought LoopBe30. So far, so good.