Options/Allow multiple instances

Explorer++

Tools/Options.../Allow multiple instances

System Default:   Yes

By default, Explorer++ allows multiple instances of itself, that is, you may open more a one copy of Explorer++.  Each new copy can have its own set of tabs and settings, etc., subject to information below.  If this option is disabled (box unchecked), ie. do not allow multiple instances, then attempting to open a second copy of Explorer++ (eg. by double-clicking on a shortcut) will open a new tab instead.

    Info: While multiple instances of Explorer++ are open, each copy maintains tab and settings information in its own memory space.  However, on closing, each copy will write complete settings information to the Windows registry (or config.xml file).  Closing the next copy will also do this, overwriting the settings from the first.  This means that the last closed instance of Explorer++ ultimately determines the settings (and tab information) saved for the next session.  This behavior is by design.
 
    Tip: If you have multiple copies of Explorer++ open, the one with your preferred tabs (and settings) should be closed last.  If multiple instances are being used along with portable mode, you can make a backup copy of your config.xml file.