I bought it years ago so I don’t get support anymore, I would have to buy a new license. It’s definitely the exact same version.
Thing is, Windows 11 or not, since the sounds and notifications are turned off in the emClient settings themselves, that right there should turn them all off regardless of what Windows is set to. So really, the Windows settings should be irrelevant, emClient should never attempt to play a sound.
This seems reminiscent of this thread: How do I turn off sound notifications - #6 by cyberzork
In fact, even if all the sound files are deleted from the sound, a (different) sound still plays just like this thread says.