I was experimenting a little bit using ASIO4ALL driver and by mistake, I used an output device with a sample rate other than 48kHz. In the consequence, Jamulus told me, that it has to be restarted and now ASIO4ALL can not be selected any more:

In the consequence, also the ASIO4ALL settings can not be opened any more from within Jamulus in order to fix these settings.

Is it possible to change the current behaviour, such that invalid soundcard settings prevents connecting to a server (in conjunction with an error message), but still be able to choose an invalid ASIO entry in setup when not connected?