Glad to hear you got Ktuner working on Windows 11! Sometimes it's just a matter of grabbing the latest version to iron out those pesky bugs. Tech quirks can be a puzzle, but you cracked it!
By the way, if you're looking for Windows 11 itself, you can check out https://digitalchillmart.com/product/windows-11-pro-32-64-bit/. It's always good to have access to the latest OS.
Updating to the latest version is usually the best solution when older versions crash on newer operating systems. It can be really frustrating when things don't work as expected, but I'm glad you found a workaround! If you ever need any more help or have any other questions about Windows 11 or even Windows 10 key, don't hesitate to ask.