Generic Remote window undersized

Good afternoon. I’ve just opened my GR window (v10.5 Elements) and it appears on my screen at about 2,5 cm across by 1.5 cm high, with only the name of the current setting (“Transport”) visible. I can change the setting to (eg) VST 17-32 or VST 33-48. But I can’t re-size the window to access and change the parameters of my “Transport” setting.
Any ideas, please? Many thanks in anticipation.