Pop up windows diasappearing

Buongiorno,

Since I started to use an additional screen, sometimes I have troubles with popup windows (such as print windows or linetype properties windows).

Those windows are not visible and the software act like they were shown on another (?) screen, even if I have only two screens (checked on windows screen settings).

This also happens (even more often) when I use draftsight with single screen.

Thanks for helping me.

Carlo