Issue Description
My workflow requires fast transition from one project to another. I want to open a new Archicad instance by default without closing the current project but keep forgetting to check the related checkbox.
Solution
Go to Options > Work Environment > More Options where you will find a checkbox for Launch new instance of Archicad when opening a project from the recent list or by dragging onto a running Archicad. Enable this option by checking the box and clicking OK.