diff --git a/default.build b/default.build
index 0295b5f669..7b83ec7e23 100644
--- a/default.build
+++ b/default.build
@@ -18,7 +18,7 @@
     <property name="build.dir" value="${root.dir}\build" />
     <property name="dlls.dir" value="${root.dir}\foreign dlls" />
 
-    <property name="build.version" value="4.6 Alpha "/>
+    <property name="build.version" value="4.6 RC 1"/>
 
     <property name="docs.dir" value="${root.dir}\docs" />
 
diff --git a/foreign dlls/Nibble.Umb.ZipUpload.dll b/foreign dlls/Nibble.Umb.ZipUpload.dll
index ddbde94eff..706dce3e4a 100644
Binary files a/foreign dlls/Nibble.Umb.ZipUpload.dll and b/foreign dlls/Nibble.Umb.ZipUpload.dll differ