FFF wrote:in the GUI the engine can not be bypassed by mouse click anymore
That was never the case. Bypass engine was only implemented as menu option.
However, I've now added support for the scroll wheel to the status images, so switching to bypass mode with the mouse wheel is now possible. Also the other status images react now on the mouse wheel.
On top I've added a new menu entry under the options menu, to allow the selection of a midi controller for the engine bypass. That will allow you to bypass the engine in headless mode.