Launch the tool: a new document window appear.
Now create a new document with File->New : the new document is located at the exact same coordinates than the initial one. This is confusing, and not usual.
A new document should be displayed with a slightly different X and Y coordinates.
Same issue with File->Open.

Surprisingly, File->Open Recent works correctly.
We need to align all the coordinates computation for different ways to create/open a document.