In the "insert" menu is a choice "External Data" option.  I chose this option. 
This brings up a window which allows you to choose a file or URL.  I choose a
test text file comprised of the following two lines:
a~b~c~d
E~F~G~H
The text import window comes up fine, and I am able to choose '~' as the
delimiter, and it puts the columns correctly.  I hit OK and it takes me back to
the "external data" window.  However, the OK is not highlighted, just the cancel
and the help buttons.  I have a blank line in the Available table/ranges option,
and I cannot seem to add anything to it.  I cannot highlight cells.  It seems
the only way out of the window is either "cancel" or "esc."  

I have not found anything that will allow me to import the data.  There is
nothing in the help files to indicate what to do.  The data is OK on the
previous window.  I think it is just some bug with the external data window.  I
have tried to import other files, and nothing seems to work.