Some larger sub-menus such as Map | Map Information, cover main menu items, requiring an extra key stroke to get to them. It seems to me this is related to newer screen sizes such as 1366×768 which have a smaller depth to width ratio.
On some functions, the selection list goes off screen. OCAD has advised this is a quirk of an underlying software they use for that display function and there is little more they can do about it for the moment.
The Map Information sub-menu can be edged upwards by clicking its title bar and dragging up until the OK button at the bottom is just exposed enough to click. Else click the x at top right to escape or on some sub-menus just click outside the panel.
The Map Grid list displayed above was shown in full by moving the dialogue box (grey) to lower right of window before making a selection. If your list panel is even larger you can move the dialogue box right until the OK button just shows. Beyond that I don’t know the answer.
OCAD improved the selection list display after I initially advised them of the issue so it now works as described in the above paragraph.
The sub menu issue will no doubt be resolved when their supplier sorts it.