Hi Denvi,
Your feedback is much appreciated.
1) Please, find attached the requested files.
2) Yes, In both good and bad cases RightClick Navigation is enabled on ZB start. However, I deactivated it and stored the ZB config (Prefs->Config->Store config). In this case, the Middle button plugin behavior is not changed. One more interesting observation is that enabling Middle button automatically triggers the RightClick Navigation in case it is disabled (is it ok?).
3) "...nothing works..." refers to panning, rotating and zooming using scroll wheel.
Thanks for your help!