Multimonitor office + house

Hello eneryone, i use Fences from about 1 year without problem moving my Flybook from office to house but about 1 month ago it started to have this problem:

i use 2 TV monitor connected to the pc, by a docking station, both at office and in the house, the problem is then when i connect the pc in office the Fences doesn't work on primary monitor (the on of the flybook) but on the 2° monitor and i don't find a way to move it on the primary.

the only way i found was by using the "screen shot", but it is very boring.

sorry for my bad English

How can i fix it??