diff --git a/Configuration.mk b/Configuration.mk
index 1bef67a..1878433 100644
--- a/Configuration.mk
+++ b/Configuration.mk
@@ -2,8 +2,8 @@
 
 # These are used when building and signing a release.
 
-VERSION ?= 2024.4
-KEYPAIR ?= 2024-04
+VERSION ?= 2024.1
+KEYPAIR ?= 2024-01
 
 # -------------------------------------------------------------
 
diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index d638c7c..83c46fa 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -4,7 +4,7 @@
       | | |  __/ |_| | | (_) |  _| (_) | |  | |_| | | |
       |_|  \___|\__|_|  \___/|_|  \___/|_|   \__|_| |_|
 
-            RetroForth & nga 2024.4 Release Notes
+            RetroForth & nga 2024.1 Release Notes
 
 ================================================================
 
@@ -81,4 +81,13 @@
   - use C preprocessor to help with readability in arg.
     processing
 
+Future Notes
+
+In 2023.9 the nga-c implementation added support (enabled by
+default) for using UTF32 (translating incoming source and output
+between UTF8 and UTF32 transparently). The fallback option (to
+just read raw 8-bit values) is now considered deprecated and
+will be removed in the future (assuming no bug reports relating
+to the UTF32 conversions are reported).
+
 ================================================================
diff --git a/image/build.retro b/image/build.retro
index 48aec2c..5823232 100644
--- a/image/build.retro
+++ b/image/build.retro
@@ -1,3 +1,3 @@
 ~~~
-#0 'BUILD const
+#1 'BUILD const
 ~~~
diff --git a/image/retro.muri b/image/retro.muri
index ce1980a..7b8e93d 100644
--- a/image/retro.muri
+++ b/image/retro.muri
@@ -1,4 +1,4 @@
-# RETRO Core 2024.4
+# RETRO Core 2024.1
 
 RETRO Core is  a minimal Forth implementation for the Nga
 virtual machine. Like Nga this is intended to be used within
@@ -149,7 +149,7 @@ r 9999
 d 1536
 
 : Version
-d 202404
+d 202401
 
 : references
 r interpret
diff --git a/ngaImage b/ngaImage
index c618790..b3f8068 100644
Binary files a/ngaImage and b/ngaImage differ
diff --git a/vm/nga-c/image.c b/vm/nga-c/image.c
index 7a97d83..0d2e113 100644
--- a/vm/nga-c/image.c
+++ b/vm/nga-c/image.c
@@ -11,7 +11,7 @@
 #endif
 #endif
 CELL ngaImageCells = 22651;
-CELL ngaImage[] = { 1793,21009,22631,22650,202404,417,389,1249,1535,0,11277,0,10,1,10,2,10,3,10,
+CELL ngaImage[] = { 1793,21009,22631,22650,202401,417,389,1249,1535,0,11277,0,10,1,10,2,10,3,10,
                        4,10,5,10,6,10,7,10,8,10,11,10,12,10,13,10,14,10,15,10,
                        16,10,17,10,18,10,19,10,20,10,21,10,22,10,23,10,24,10,25,68223234,
                        1,2575,85000450,1,656912,163,180,268505089,65,64,285281281,0,65,2063,10,101384453,0,9,10,68485378,
@@ -576,7 +576,7 @@ CELL ngaImage[] = { 1793,21009,22631,22650,202404,417,389,1249,1535,0,11277,0,10
                        7,10,11215,11262,156,12542,-213800119713087686,100,58,72,97,115,104,45,70,117,110,99,116,105,
                        111,110,0,4874,11241,11277,168,12542,7572226109254526,100,58,114,101,104,97,115,104,0,1793,11295,
                        1793,11287,2049,190,3841,11262,8,10,1,11281,2049,2241,2049,188,16,10,1,11279,2049,8490,
-                       10,11263,0,156,12528,210668957237,66,85,73,76,68,0,11300,0,156,0,-2419379730924625824,68,69,86,
+                       10,11263,1,156,12528,210668957237,66,85,73,76,68,0,11300,0,156,0,-2419379730924625824,68,69,86,
                        73,67,69,58,79,85,84,80,85,84,0,11311,1,156,0,3179875372589939872,68,69,86,73,
                        67,69,58,75,69,89,66,79,65,82,68,0,11330,2,156,0,-2419379731287713704,68,69,86,
                        73,67,69,58,70,76,79,65,84,83,0,11351,4,156,0,-5104244739232646654,68,69,86,73,