diff --git a/.gitignore b/.gitignore
index e7ba21dde..581cf6d26 100644
--- a/.gitignore
+++ b/.gitignore
@@ -52,6 +52,7 @@ UpgradeLog*.htm
 .builds
 *.pidb
 *.vcxproj.filters
+*.bak
 
 PowerEditor/bin/notepad++.exe
 PowerEditor/bin/SciLexer.dll
diff --git a/PowerEditor/bin/change.log b/PowerEditor/bin/change.log
index fd5d26558..f3e19bc32 100644
--- a/PowerEditor/bin/change.log
+++ b/PowerEditor/bin/change.log
@@ -1,3 +1,13 @@
+Notepad++ v8.1.9.1 bug-fixes and new enhancement:
+
+1.  Fix a regression of saving problem.
+2.  Fix a regression of reloading false alarm from the network drive.
+3.  Make Function list/Project panel/Folder as Workspace icon display correct under high DPI.
+4.  Make UDL generic dark mode (working for all dark theme) possible via UDL UI.
+5.  Fix phantom docked panels issue after restoring from systray.
+6.  Enable backup on save (simple) feature by default (only for the new installation).
+
+
 Notepad++ v8.1.9 bug-fixes:
 
 1.  Fix empty file with non-Unicode encoding cannot be saved issue.
@@ -34,7 +44,7 @@ Notepad++ v8.1.6 bug-fixes:
 
 
 More fixes & implementations detail:
-https://notepad-plus-plus.org/downloads/v8.1.8/
+https://notepad-plus-plus.org/downloads/v8.1.9.1/
 
 
 Included plugins:
@@ -46,4 +56,4 @@ Included plugins:
 
 Updater (Installer only):
 
-* WinGup (for Notepad++) v5.2.1
+* WinGup (for Notepad++) v5.2.2
diff --git a/PowerEditor/src/resource.h b/PowerEditor/src/resource.h
index f03970d00..13de1e5cf 100644
--- a/PowerEditor/src/resource.h
+++ b/PowerEditor/src/resource.h
@@ -19,12 +19,12 @@
 //
 // Notepad++ version: begin
 //
-#define NOTEPAD_PLUS_VERSION TEXT("Notepad++ v8.1.9")
+#define NOTEPAD_PLUS_VERSION TEXT("Notepad++ v8.1.9.1")
 
 // should be X.Y : ie. if VERSION_DIGITALVALUE == 4, 7, 1, 0 , then X = 4, Y = 71
 // ex : #define VERSION_VALUE TEXT("5.63\0")
-#define VERSION_VALUE TEXT("8.19\0")
-#define VERSION_DIGITALVALUE 8, 1, 9, 0
+#define VERSION_VALUE TEXT("8.191\0")
+#define VERSION_DIGITALVALUE 8, 1, 9, 1
 
 // Notepad++ version: end