update README*

README.md

@@ -210,7 +210,7 @@ The portable version doesn't use registry but an ini file.
     - Fixed "Search" dialog.
     - Improved status message.
     - Improved modified flag handling.
-- v.5.4.1 (2020.XX.YY)
+- v.5.4.1 (2020.06.14)
     - Fixed the bug that the second overwrite save fails.
     - Fixed title bar text.
     - Fixed status bar message.

README.txt

@@ -206,7 +206,7 @@ Question 6. What is the difference between no installer and portable version?
     - Fixed "Search" dialog.
     - Improved status message.
     - Improved modified flag handling.
-- v.5.4.1 (2020.XX.YY)
+- v.5.4.1 (2020.06.14)
     - Fixed the bug that the second overwrite save fails.
     - Fixed title bar text.
     - Fixed status bar message.

READMEIT.txt

@@ -206,7 +206,7 @@ Domanda 6. Qual è la differenza tra nessuna versione di installazione e portati
   Corretto problema testo finestra "Trova".
   Migliorati messaggi di stato (narra inferiore sinistra).
   Migliorata gestione flag.
-- v.5.4.1 (YY.XX.2020)
+- v.5.4.1 (14.06.2020)
     - Fixed the bug that the second overwrite save fails.
     - Fixed title bar text.
     - Fixed status bar message.

READMEJP.txt

@@ -518,7 +518,7 @@
         「検索」ダイアログを修正。
         状態メッセージを改良。
         変更フラグの扱いを改良。
-    v.5.4.1 (2020.XX.YY)
+    v.5.4.1 (2020.06.14)
         二回目の上書き保存で失敗する不具合を修正した。
         タイトルバーテキストを修正。
         ステータスバーメッセージを修正。