Window opening across 2 monitors

[PHannah]

My Add Files dialogue window has recently started opening spread across my 2 monitors.

I was hoping if I moved the window to be just on one monitor that it would open there next time. But no - it continues to open spanning the 2 monitors.

Nothing I have tried will fix it.

Can someone please tell me how to adjust the file selection window so that it opens in the place on my desktop where I last moved it to? Or if I can specify where it opens.

Thanks
Peter.

[PHannah]

It seems no-one else has seen this behaviour. Can I change the question slightly:

How does PixInsight decide where (on the desktop) to place a newly-opened file selection window?

Thanks
Peter.