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This was your problem:
Your category was set as '1":
INSERT INTO `xb6d_lxcategories` VALUES (1,'Cutting Terms','.',0,1,0);
But all the items had a category ID (the second value in each entry) set to "0":
INSERT INTO `xb6d_lxentries` VALUES (1,0,'corn flour','C','Corn (maize) flour is popular in the Southern and Southwestern US and in Mexico. Coarse whole-grain corn flour is usually called corn meal. Corn meal that has been bleached with lye is called masa harina (see masa) and is used to make tortillas and tamales in Mexican cooking. Corn flour should never be confused with cornstarch, which is known as "cornflour" in British English.','','',1,0,1276000881,414,1,1,1,1,1,0,0,0,0),
I've emailed you the correct SQL file, so just import the SQL, update the Lexikon module , and you're ready to go.