separate application windows
 

when i open an excel file whilst the excel application window is open
the new file opens up as a workbook window within the application
window. now, this has only just started happening and i suspect it was
when i opened a file with different settings than standard. so far i
have been unable to work out how to revert to the original settings,
its quite irritating separate application windows on the task bar are
much easier to work with i.e. pressing 'alt + tab' to switch between
windows. does anyone know how to change the settings back?

Much appreciated

JC