I have edited a session on a secondary monitor on a multi-monitor setup using the embedded client under Windows 10. Afterwards, I reopened the session without the secondary monitor but I don't see the session window on the main monitor. Is there a way to reset it to the main monitor?
What do you mean? One you've confirmed within 10 seconds or so it's saved, isn't it? By the way I notice that sometimes the second monitor is detected but I can't extend the display to 1, the menu comes back to display only on the first monitor.
Window positions are saved in C:\Users\username\AppData\Roaming\open-stage-control\Config\config.json, removing this file (or editing the file and deleting the "client" entry under "geometry" if you want to keep the launcher's last config) should reset them.