diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab7b274a5..c0bd7f373 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ All notable changes to this project will be documented in this file.
 - Hex view refreshing after selecting Unknown tag
 - [#1818] GFX: Importing XML
 - GFX: Correct refreshing image when raw editing DefineExternalImage/2, DefineSubImage
+- GFX: DefineExternalImage/2, DefineSubImage disallow not working replace button in favor of raw editing
 
 ## [16.0.4] - 2022-11-03
 ### Fixed
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineExternalImage.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineExternalImage.java
index 2c2529de0..8db1c549f 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineExternalImage.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineExternalImage.java
@@ -198,4 +198,9 @@ public class DefineExternalImage extends ImageTag {
             }
         }
     }
+    
+    @Override
+    public boolean importSupported() {
+        return false;
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineExternalImage2.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineExternalImage2.java
index b8f69776d..e09968c03 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineExternalImage2.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineExternalImage2.java
@@ -210,4 +210,9 @@ public class DefineExternalImage2 extends ImageTag {
             }
         }
     }
+    
+    @Override
+    public boolean importSupported() {
+        return false;
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineSubImage.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineSubImage.java
index 026559894..abb748326 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineSubImage.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/gfx/DefineSubImage.java
@@ -124,11 +124,14 @@ public class DefineSubImage extends ImageTag {
 
     @Override
     public void setImage(byte[] data) throws IOException {
-        serImage = new SerializableImage(ImageHelper.read(data));
-        clearCache();
-        setModified(true);
+        
     }
 
+    @Override
+    public boolean importSupported() {
+        return false;
+    }
+        
     @Override
     public ImageFormat getImageFormat() {
         return ImageFormat.PNG;