The first release would only find the same Stream Deck as I tested, 5x3 MK1 Version 2! This release finds any Elgato device connected, It will then display the PID (Product ID) and the Version number.
Stream deck Mk1 Version 2
I have ordered a new Stream Deck XL which will arrive next week, I will check the software with that and add a method of selecting between Elgato devices.
Older versions of the Stream Deck use a different protocol, it may not be possible to support both Old and New. Some use BMP and some use JPG images
If you are running the Elgato app then it will control the Stream Deck and not allow XPatch4.2 access. There are two solutions to this, 1) uninstall the Elgato app (500+Mbytes) the other is to disable or remove the app that loads the Elgato app on start up (I used CCleaner), you can then launch the Elgato app when you wish.
As part of my tests I updated the software in my Stream Deck, it still worked after the update (Once I stopped the Elgato app), however the version number changed to ‘0’?
I would appreciate any feedback on PID, Stream Deck key layout and Version so that I can provide support information.