4.5.5 - Window Size is Tiny

Hi there, I have newly instally Pianoteq but the window size is very small on a new laptop. Using the magnification tool brings it up to a more or less normal size, but it says it is 250% magnification!..(and some of the notes on buttons still appear very very tiny - I have to put on my reading glasses). Is this a glitch just in 4.5.5..? Any notions.. Thanks for all help!