diff --git a/CHANGELOG b/CHANGELOG
index 36ffada..dfeccb3 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,11 +1,12 @@
-Version 0.8.5 prerelease (2009.06.14):
+Version 0.8.5 (2009.06.18):
     * added:   new language: Chinese
                translation made by: Juis <zsyfly at gmail dot com>
     * changed: version of the TTMath library: 0.8.5 now
                
-Changes from TTMath 0.8.5 relating to TTCalc:
+    Changes from TTMath 0.8.5 relating to TTCalc:
     * fixed:   Big::Mod(x) didn't correctly return a carry
                and the result was sometimes very big (even greater than x)
+    * changed: factorial() function is much faster now
 
 
 Version 0.8.4 (2009.05.08):
@@ -51,7 +52,7 @@ Version 0.8.3 (2009.04.06):
     * removed: 'cut off last non valid digits' on 'rounding' option
                on 'display' tab
 
-Changes from TTMath 0.8.3 relating to TTCalc:
+    Changes from TTMath 0.8.3 relating to TTCalc:
     * fixed:   Big::Add incorrectly rounded 'this' when both exponents were equal
                it caused that sometimes when adding a zero the result has changed
                this had impact among other things on FromString() method
diff --git a/README b/README
index c77968a..87a2e19 100644
--- a/README
+++ b/README
@@ -19,5 +19,5 @@ Contact:           t.sowa@ttmath.org
 Licence:           BSD (open source)
 Interface:         English, Polish, Spanish, Danish, Chinese
 Project page:      http://ttcalc.sourceforge.net/
-Bignum library:    TTMath http://ttmath.org/
+Bignum library:    TTMath http://www.ttmath.org/
 Operating systems: Microsoft Windows 9x/Me/NT/2000/XP/Vista
diff --git a/help/index.html b/help/index.html
index f25cb4e..f092b51 100644
--- a/help/index.html
+++ b/help/index.html
@@ -7,6 +7,7 @@
 	<link rel="stylesheet" href="styles.css" type="text/css">
 	<object type="application/x-oleobject" classid="clsid:1e2a7bd0-dab9-11d0-b93a-00c04fc99f9e">
 		<param name="Keyword" value="TTCalc">
+		<param name="Keyword" value="TTMath">
 		<param name="Keyword" value="author">
 		<param name="Keyword" value="contact">
 		<param name="Keyword" value="licence">
@@ -45,7 +46,7 @@ display values with the base (radix) from two to sixteen.
 <tr><td>Licence:</td><td>BSD (open source)</td></tr>
 <tr><td>Interface:</td><td>English, Polish, Spanish, Danish, Chinese</td></tr>
 <tr><td>Project page:</td><td><a href="http://ttcalc.sourceforge.net/">http://ttcalc.sourceforge.net/</a></td></tr>
-<tr><td>Bignum library:</td><td>TTMath <a href="http://ttmath.org/">http://ttmath.org/</a></td></tr>
+<tr><td>Bignum library:</td><td>TTMath <a href="http://ttmath.org/">http://www.ttmath.org/</a></td></tr>
 <tr><td>Operating systems:</td><td>Microsoft Windows 9x/Me/NT/2000/XP/Vista</td></tr>
 </table>
 
diff --git a/src/compileconfig.h b/src/compileconfig.h
index 064758c..c167d18 100644
--- a/src/compileconfig.h
+++ b/src/compileconfig.h
@@ -56,7 +56,7 @@
 #define TTCALC_MAJOR_VER		0
 #define TTCALC_MINOR_VER		8
 #define TTCALC_REVISION_VER		5
-#define TTCALC_PRERELEASE_VER	1
+#define TTCALC_PRERELEASE_VER	0
 
 
 
diff --git a/src/languages.cpp b/src/languages.cpp
index e1d8eef..cc96be0 100644
--- a/src/languages.cpp
+++ b/src/languages.cpp
@@ -907,6 +907,7 @@ void Languages::InitGuiMessagesTab()
 	InsertGuiPair(menu_view_lang_polish,	"&波兰语");
 	InsertGuiPair(menu_view_lang_spanish,	"&西班牙语");
 	InsertGuiPair(menu_view_lang_danish,	"&丹麦语");
+	InsertGuiPair(menu_view_lang_chinese,	"&简体中文");
 	InsertGuiPair(menu_view_close_program,	"&关闭");
 	InsertGuiPair(menu_edit_undo,			"&取消");
 	InsertGuiPair(menu_edit_paste,			"&粘贴");