diff --git a/Build/Changes.txt b/Build/Changes.txt
index 003be43f0..f2aa230a7 100644
--- a/Build/Changes.txt
+++ b/Build/Changes.txt
@@ -33,7 +33,7 @@ UCD - (UCD)ARDET is an Encoding Detector Library
 
 
 ========================================================
-Current BETA/RC Version 5.21.526.(build_#) (2021-05-26)
+Current BETA/RC Version 5.21.527.(build_#) (2021-05-27)
 ========================================================
 
 --------------------------------------------------------
@@ -120,6 +120,10 @@ CHANGES:
 [.302.1]- Prevent Path to URL conversion, if Hyperlink RegEx pattern does not match.
 [.301.1]- Enable Dark Mode feature for Win10 v21H1 insider beta.
 [.301.1]- EOL-Mode: status-bar double-click : inverted cyclic change rotation CRLF -> LF -> CR.
+
+--------------------------------------------------------
+CHANGES Versions in Tools or Libraries:
+--------------------------------------------------------
 [.515.1]- Update grepWinNP3 (GRE) version 2.1.7.37 (2021-05.14).
 [.525.1]- Update Oniguruma Regex (ONI) engine version 7.0.0 (2021-05-17).
 [.429.1]- Update Lexilla Library (LEX) version 5.0.2 (2021-04-23).
@@ -129,6 +133,8 @@ CHANGES:
 FIXES:
 --------------------------------------------------------
 [.###.#]- .
+[.527.1]- Correct handling of F/R dialog pattern combo-box dropdown list.
+[.527.1]- Minor fixes Markdown-Lexer.
 [.513.1]- Go to doc begin after global indentation change.
 [.513.1]- Minor enhancements for selection scroll to view.
 [.513.1]- Optimized handling of multi-step undo/redo notifications.
diff --git a/Versions/day.txt b/Versions/day.txt
index 6bf99008f..678dee3e1 100644
--- a/Versions/day.txt
+++ b/Versions/day.txt
@@ -1 +1 @@
-526
+527
diff --git a/res/Notepad3.exe.manifest.conf b/res/Notepad3.exe.manifest.conf
index 606df802a..ca5eef776 100644
--- a/res/Notepad3.exe.manifest.conf
+++ b/res/Notepad3.exe.manifest.conf
@@ -3,7 +3,7 @@
   <assemblyIdentity
     name="Rizonesoft.Notepad3"
     processorArchitecture="*"
-    version="5.21.526.1"
+    version="5.21.527.1"
     type="win32"
   />
   <description>Notepad3 beta</description>
diff --git a/src/DarkMode/DarkMode.cpp b/src/DarkMode/DarkMode.cpp
index d950b2057..a7fec6a5e 100644
--- a/src/DarkMode/DarkMode.cpp
+++ b/src/DarkMode/DarkMode.cpp
@@ -73,7 +73,7 @@ constexpr bool CheckBuildNumber(DWORD buildNumber)
     case 19042: // Win10 v20H2
     case 19043: // Win10 v21H1 Insider Beta and Release Preview Channels [2021-04-28]
     // unknown, if working with these version(s) :-O
-    case 21387: // Win10 v21H2 Insider Dev Channel [2021-05-18]
+    case 21390: // Win10 v21H2 Insider Dev Channel [2021-05-21]
         return true;
     default:
         // not supported
diff --git a/src/VersionEx.h b/src/VersionEx.h
index 03402b7af..0c24b5b0f 100644
--- a/src/VersionEx.h
+++ b/src/VersionEx.h
@@ -8,7 +8,7 @@
 #define SAPPNAME "Notepad3"
 #define VERSION_MAJOR 5
 #define VERSION_MINOR 21
-#define VERSION_REV 526
+#define VERSION_REV 527
 #define VERSION_BUILD 1
 #define SCINTILLA_VER 502
 #define LEXILLA_VER 502