What Interface did you use before? Did that have ASIO Drivers as well?
If yes, these drivers might still be vailable but due to the missing hardware can’t be intialized by mAirlist.
There is an option to tell mAirlist to ignore a specific ASIO device, you can see the settings in the german thread.
Set all ASIO devices to ignore, except your UMC 1820. Or even including the 1820 if you only use WASAPI for it.