I have two monitors (one 1440p, another 1080p, vertically mounted so the 1080 is above the 1440, with the 1440p monitor being my primary display).
I have an issue where if I place a secondary display on my 1080p monitor, the next time I start ERAM, it hangs on the "checking version" step and becomes unresponsive. I have a similar issue in vSTARS with ASDE-X displays on the other monitor.
When inspecting the config XML file, I noticed the Y-coordinate of the secondary display is a negative number (which shouldn't be an issue), and I am able to fix it by changing the Y-coordinate to 0