It is important to remember that the "Mode" setting decide which files to show and work with from the the instrument.
Therefore, if the right-hand window ie. which holds the content of the connected instrument is empty it is probably because you are in the "wrong Mode".
Only those measurement files that belong to the Mode chosen will be displayed and open for "use".
PS! The "Browser" window at the left-hand side will however show each of the stored folders under "My Measurements" independent on which "mode".