When re-opening MMEX the application recognizes that it can fit into one of the attached monitors and then opens in the X,Y position BUT it opens at another location. In addition to opening on the wrong display, the toolbar then has additional margin padding

On my setup the windows are reported as:

screen 0: x:0, y:25, w:1680, h:969, fit:false, primary:true
screen 1: x:-918, y:-1415, w:3440, h:1415, fit:false, primary:false
screen 2: x:-3478, y:-1415, w:2560, h:1415, fit:true, primary:false

In reality, the screens are laid out as:

The saved position that the application is trying to recover to is:

saved dimensions : x:-3087, y:-1232, w:1850, h:993, maximized:false

this should restore to screen 2 but actually restores across screens 0 and 1, as shown below in yellow

Needs a bit of investigation....