The Modular V could be resized vertically via a pull-down handle on the lower right of the window up to and including version 3.4.0.x. For the upgrade to 3.7.0.x, they removed the handle when they put in the predefined macros on the lower right. To me (as a software engineer of over 40 years), this looks like a bug, or a design flaw when they added the macros. (One will note that the windows will resize Horizontally, when you activate the macro setup via the gear icon on the upper right in 3.7.0, so It is quite possible to resize the windows.
Not being able to resize the Modular window vertically severely limits the usability of the program. I have already set up a portrait-oriented monitor specifically to use the Modular , and it worked fine...up until 3.7.0 From my point of view, I'd much rather have the resize option than the macros.