Index: gc_lang/fr/oxt/DictOptions/LexiconEditor.py
==================================================================
--- gc_lang/fr/oxt/DictOptions/LexiconEditor.py
+++ gc_lang/fr/oxt/DictOptions/LexiconEditor.py
@@ -475,10 +475,12 @@
                 lFile = xFilePicker.getFiles()
                 spfExported = lFile[0][5:].lstrip("/") # remove file://
                 if platform.system() != "Windows":
                     spfExported = "/" + spfExported
                 spfExported = urllib.parse.unquote(spfExported)
+                if not spfExported.endswith((".json", ".JSON")):
+                    spfExported += ".json"
                 #spfExported = os.path.join(os.path.expanduser("~"), "fr.personal.json")
                 sJSON = self.xOptionNode.getPropertyValue("personal_dic")
                 if sJSON:
                     with open(spfExported, "w", encoding="utf-8") as hDst:
                         hDst.write(sJSON)