You can download the latest driver
here.
Set it to 2 channel 32-bit output in Topping control panel to avoid a bug that prevents exclusive mode output in ASIO/WASAPI. In the Windows sound control panel set anything you want except 384kHz to avoid loud pop when switching between sounds with different frequencies.
Not for now.
These modes are filters for PCM only and you can't actually avoid processing. I am using mode 1.
Probably, someone here wrote about that.
Yes. But I don't see/hear the reason why you would not use its preamp feature accessible also from the remote.