diff --git a/Build/Changes.txt b/Build/Changes.txt
index 687e9b9c9..fc7b9853e 100644
--- a/Build/Changes.txt
+++ b/Build/Changes.txt
@@ -33,13 +33,14 @@ UCD - (UCD)ARDET is an Encoding Detector Library
 
 
 ========================================================
-Current BETA/RC Version 5.21.414.(build_#) (2021-04-14)
+Current BETA/RC Version 5.21.415.(build_#) (2021-04-15)
 ========================================================
 
 --------------------------------------------------------
 NEW:
 --------------------------------------------------------
 [.###.#]- .
+[.415.1]- Cut lines for rectangular and multi selection.
 [.412.1]- Use 'Ctrl+' key to force dropping files into new instance (Ctrl+ for new instance).
 [.402.1]- ScintillaWin horizontal mouse-wheel support.
 [.331.2]- Provide Mono-Language IDs.
@@ -59,7 +60,8 @@ NEW:
 CHANGES:
 --------------------------------------------------------
 [.###.#]- .
-[.###.#]- New size "4MB" for "FileLoadWarningMB=4" (Styling and Syntax Highlighting are switched off).
+[.415.1]- Cpp-Lexer fix merged from Lexilla (5b92f7219a9fe9fb0ae4c5cc19f57c39185e4074.
+[.414.1]- New size "4MB" for "FileLoadWarningMB=4" (Styling and Syntax Highlighting are switched off).
 [.413.2]- Configurable position offset on launching new instance.
 [.413.1]- Clarify menu item string (only one instance per file).
 [.413.1]- Drag-n-Drop: allow multiple files to drop.
@@ -83,13 +85,14 @@ CHANGES:
 [.301.1]- EOL-Mode: status-bar double-click : inverted cyclic change rotation CRLF -> LF -> CR.
 [.411.1]- Update grepWinNP3 (GRE) version 2.1.7.36 (2021-04.07).
 [.402.1]- Update Oniguruma Regex (ONI) engine version 6.9.7 RC1 (2021-03-31).
-[.406.1]- Update Lexilla Library (LEX) version 5.0.1 (2021-04-05).
+[.415.1]- Update Lexilla Library (LEX) version 5.0.1 (2021-04-09).
 [.411.1]- Update Scintilla Library (SCI) version 5.0.1 (2021-04-09).
 
 --------------------------------------------------------
 FIXES:
 --------------------------------------------------------
 [.###.#]- .
+[.415.1]- Small correction to Line Cut feature (thin selection).
 [.414.2]- Minipath uses NP§ preferred language, if not configured.
 [.414.2]- Compiling mono-language compiler switch version.
 [.414.2]- Some minor bugs around MUI Language selection.
diff --git a/Build/build_non_mui_ver.txt b/Build/build_non_mui_ver.txt
index 5eedbee43..c585a695c 100644
--- a/Build/build_non_mui_ver.txt
+++ b/Build/build_non_mui_ver.txt
@@ -19,13 +19,17 @@ Important:  Make all modifications with a text editor (not the Resource-Editor),
            E.g.: for German: At the begin of the ".rc" files (the real include section)
              #elif defined(MUI_BASE_LNG_DE_DE)
                "#include ""../language/np3_de_de/np3_de_de.rc""\r\n"
+
            E.g.: for German: At the end of the ".rc" files
              #elif defined(MUI_BASE_LNG_DE_DE)
                #include "../language/np3_de_de/np3_de_de.rc"
 
 III.   Check: ".\language\common_res.h"
-              ".\minipath\language\common_res.h"
        - Make sure that the desired Base Language exists in the list of Language resources.
+           E.g.: for German:
+             #elif defined(MUI_BASE_LNG_DE_DE)
+               #define MUI_BASE_LNG_ID L"de-DE"
+       Check: ".\minipath\language\common_res.h"
            E.g.: for German:
              #define MUI_BASE_LNG_ID MAKELANGID(LANG_GERMAN, SUBLANG_GERMAN)
                #elif defined(MUI_BASE_LNG_EL_GR)
diff --git a/Versions/build.txt b/Versions/build.txt
index 0cfbf0888..d00491fd7 100644
--- a/Versions/build.txt
+++ b/Versions/build.txt
@@ -1 +1 @@
-2
+1
diff --git a/Versions/day.txt b/Versions/day.txt
index d1b9f6a9c..21c8d99fe 100644
--- a/Versions/day.txt
+++ b/Versions/day.txt
@@ -1 +1 @@
-414
+415
diff --git a/res/Notepad3.exe.manifest.conf b/res/Notepad3.exe.manifest.conf
index e3f8236fc..1acf1c008 100644
--- a/res/Notepad3.exe.manifest.conf
+++ b/res/Notepad3.exe.manifest.conf
@@ -3,7 +3,7 @@
   <assemblyIdentity
     name="Notepad3"
     processorArchitecture="*"
-    version="5.21.414.2"
+    version="5.21.415.1"
     type="win32"
   />
   <description>Notepad3 beta</description>
diff --git a/src/VersionEx.h b/src/VersionEx.h
index 3cc6ec111..60259f14d 100644
--- a/src/VersionEx.h
+++ b/src/VersionEx.h
@@ -8,8 +8,8 @@
 #define SAPPNAME "Notepad3"
 #define VERSION_MAJOR 5
 #define VERSION_MINOR 21
-#define VERSION_REV 414
-#define VERSION_BUILD 2
+#define VERSION_REV 415
+#define VERSION_BUILD 1
 #define SCINTILLA_VER 501
 #define LEXILLA_VER 501
 #define ONIGURUMA_REGEX_VER 6.9.6