Cannot import this STL file

I have a few STL files I got from someone else for a project.  I am importing each of them, but there are two files in the bunch that just will not import.  I choose the file then click "Import".  After a minute of trying I get the error: "Could not import file: execution of (bspxform) aborted."

Here is a link to the files:  https://dl.dropboxusercontent.com/u/267254/BoomProp-14mm.zip
The files in question are "2-Blade Spinner" and "3-Blade Spinner". 
Any clue why they won't import?


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