diff -Naur old/dxf2gcode.py new/dxf2gcode.py
--- old/dxf2gcode.py	2013-08-24 00:48:32.000000000 +0200
+++ new/dxf2gcode.py	2013-09-02 20:53:19.687595641 +0200
@@ -403,7 +403,7 @@
         (beg, ende) = os.path.split(str(self.load_filename))
         (fileBaseName, fileExtension) = os.path.splitext(ende)
         
-        default_name = os.path.join(g.config.vars.Paths['output_dir'], fileBaseName)
+        default_name = os.path.join(g.config.vars.Paths['output_dir'], (fileBaseName + ".ngc"))
         
         selected_filter = self.MyPostProcessor.output_format[0]
         filename = QtGui.QFileDialog.getSaveFileName(self, self.tr('Export to file'),
diff -Naur old/PostPro/PostProcessorConfig.py new/PostPro/PostProcessorConfig.py
--- old/PostPro/PostProcessorConfig.py	2013-08-20 16:36:42.000000000 +0200
+++ new/PostPro/PostProcessorConfig.py	2013-09-02 20:23:57.274856309 +0200
@@ -48,8 +48,8 @@
     str(POSTPRO_VERSION) + '")\n' + \
 '''
     [General]
-    output_format = string(default=".ngx")
-    output_text = string(default="G-CODE for EMC2")
+    output_format = string(default=".ngc")
+    output_text = string(default="G-CODE for LinuxCNC")
     output_type = string(default="g-code")
     
     abs_export = boolean(default=True)
diff -Naur old/postpro_config/postpro_config.cfg new/postpro_config/postpro_config.cfg
--- old/postpro_config/postpro_config.cfg	2013-08-24 01:54:46.000000000 +0200
+++ new/postpro_config/postpro_config.cfg	2013-09-02 20:23:39.422767785 +0200
@@ -9,8 +9,8 @@
     config_version = 2
 
 [General]
-    output_format = .ngx
-    output_text = G-CODE for EMC2
+    output_format = .ngc
+    output_text = G-CODE for LinuxCNC
     output_type = g-code
     
     abs_export = True