diff --git a/SMBSync2/src/main/assets/SMBSync2_Change_EN.html b/SMBSync2/src/main/assets/SMBSync2_Change_EN.html
index 359b985c..d7b9ec50 100644
--- a/SMBSync2/src/main/assets/SMBSync2_Change_EN.html
+++ b/SMBSync2/src/main/assets/SMBSync2_Change_EN.html
@@ -3,7 +3,12 @@
SMBSync2_Change_EN
-2021-03-01 Ver2.50
+2021-03-07 Ver2.49
+
+- Fixed the bug that notification messages remain.
+
+
+2021-03-01 Ver2.50
- Improved Chinese (zh)
- Resolved a bug that left a notification message when rebooting
diff --git a/SMBSync2/src/main/assets/SMBSync2_Change_JA.html b/SMBSync2/src/main/assets/SMBSync2_Change_JA.html
index c23aafb5..dcbfdd20 100644
--- a/SMBSync2/src/main/assets/SMBSync2_Change_JA.html
+++ b/SMBSync2/src/main/assets/SMBSync2_Change_JA.html
@@ -3,7 +3,12 @@
SMBSync2_Change_JA
-2021-03-01 Ver2.50
+2021-03-07 Ver2.51
+
+2021-03-01 Ver2.50
- 中国語(zh)の改善
- 再起動時の通知メッセージが残るバグを解決
diff --git a/debug_apk/SMBSync2_debug.apk b/debug_apk/SMBSync2_debug.apk
index e51bf1fa..a11956bc 100644
Binary files a/debug_apk/SMBSync2_debug.apk and b/debug_apk/SMBSync2_debug.apk differ
diff --git a/help/SMBSync2_Change_EN.md b/help/SMBSync2_Change_EN.md
index e3cb3ee1..35b9dd4f 100644
--- a/help/SMBSync2_Change_EN.md
+++ b/help/SMBSync2_Change_EN.md
@@ -1,3 +1,17 @@
+#### 2021-03-07 Ver2.49
+
+- Fixed the bug that notification messages remain.
+
+#### 2021-03-01 Ver2.50
+
+- Improved Chinese (zh)
+- Resolved a bug that left a notification message when rebooting
+
+#### 2021-02-22 Ver2.49
+
+- Fixed bug that file size filter warning message is always displayed when app is launched.
+- Fixed the bug that notification messages remain.
+
#### 2021-02-20 Ver2.48
- Added file size and file last modified date to file filters
diff --git a/help/SMBSync2_Change_EN.pdf b/help/SMBSync2_Change_EN.pdf
index 4ad77e9b..bb698329 100644
Binary files a/help/SMBSync2_Change_EN.pdf and b/help/SMBSync2_Change_EN.pdf differ
diff --git a/help/SMBSync2_Change_JA.md b/help/SMBSync2_Change_JA.md
index f40f5162..78e4e3a6 100644
--- a/help/SMBSync2_Change_JA.md
+++ b/help/SMBSync2_Change_JA.md
@@ -1,3 +1,17 @@
+#### 2021-03-07 Ver2.51
+
+- 通知メッセージが残るバグを解決
+
+#### 2021-03-01 Ver2.50
+
+- 中国語(zh)の改善
+- 再起動時の通知メッセージが残るバグを解決
+
+#### 2021-02-22 Ver2.49
+
+- アプリ起動時にファイルサイズフィルターの警告メッセージが常に表示されるバグを解決
+- 通知メッセージが残るバグを解決
+
#### 2021-02-20 Ver2.48
- ファイルフィルターにファイルサイズとファイルの最終更新日を追加
diff --git a/help/SMBSync2_Change_JA.pdf b/help/SMBSync2_Change_JA.pdf
index 73c85803..3edb2ae1 100644
Binary files a/help/SMBSync2_Change_JA.pdf and b/help/SMBSync2_Change_JA.pdf differ