Your assumption is correct. Under USB-controllers there is in fact an entry "Xscope". So, I uninstalled it and actually re-installed your usb drivers. Same result as before, no entry in the device manager but under usb-controllers. I then deinstalled that again and simply tried your USB XP drivers. That worked!
So my PC-interface is in operation again. There are some glitches in the software which you mentioned, not too bad, though.
Only, I assume, the operation with the USB XP drivers which I now got is not what you intended it to be, isn't it?
Anyhow, the Xprotolab is an outstanding development with big potential!
Congratulations!

Great that you have it working again. Regardless of the driver, the operation of the program will be the same.