Jump Desktop rotates desktop of computer

When I connect from my iPhone to my MacMini with Jump it rotates my MacMini's desktop 90 deg. counter-clockwise. Sometimes not at first but eventually does. The screen's representation on my iPhone is correct but if looking the display of the MacMini it is rotated. When I quit JumpDesktop this has no effect on the screen's rotation, making navigation to the the preferences to rotate back quick challenging.