I have 4 monitors, so sometimes it is cumbersome to have to sequentially move a window from one to another that is 2 or 3 away using the menu bar button or the shortcut (ctrl-win-x). It would be great if I could put menu bar buttons that were one-click to a specific monitor, or have a button that has a popup display of the 4 monitors so a second click move the window straight there (like UltraMon).

You can do this. In Settings, under Functions, click the Add button.

Function Action: Window Management
Window Screen Action: Move window to monitor #X
In the Monitor area on the right, select the specific monitor.
Press OK

Back in the Settings dialog, ensure your new function is highlighted and then press the |Toggle TitleBar Button" button.

Seeing as that's the third or fourth time I've posted that same solution, I'm wondering if the UI isn't as intuitive as it could be. Maybe the Add button could be changed to New or Custom, in order to make its purpose more obvious.