I found/learned that the file you provide if I export Gramps XML is compressed and must be uncompressed for me to be able to look at the contents with most any text editor.  I have not been able to discover what the format is if I request SQLLite output.  It, too, seems to be compressed, but whereas WINRar was able to deal with your compressed XML file, it is unhappy with whatever the SQLLite format is.  Can you please advise?  Thank you.