diff --git a/CHANGELOG b/CHANGELOG
index 9ad4d7b..115956b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,4 @@
-Version 0.8.6 prerelease (2009.06.25):
+Version 0.8.6 (2009.06.30):
     * added:   new language: Russian
                translation made by: Vladimir Gladilovich <vdgladilovich at gmail dot com>
                
diff --git a/setup/innosetup.iss b/setup/innosetup.iss
index f6500fa..2ef3db1 100644
--- a/setup/innosetup.iss
+++ b/setup/innosetup.iss
@@ -3,8 +3,8 @@
 
 [Setup]
 AppName=TTCalc
-AppVerName=TTCalc 0.8.5
-AppVersion=0.8.5
+AppVerName=TTCalc 0.8.6
+AppVersion=0.8.6
 AppPublisher=Tomasz Sowa
 AppPublisherURL=http://ttcalc.sourceforge.net
 AppSupportURL=http://ttcalc.sourceforge.net
@@ -27,6 +27,7 @@ Name: "polish"; MessagesFile: "compiler:Languages\Polish.isl"
 Name: "spanish"; MessagesFile: "compiler:Languages\Spanish.isl"
 Name: "danish"; MessagesFile: "compiler:Languages\Danish.isl"
 Name: "chinese"; MessagesFile: "compiler:Languages\ChineseSimp-12-5.1.11.isl"
+Name: "russian"; MessagesFile: "compiler:Languages\Russian.isl"
 
 [InstallDelete]
 ; prior to 0.8.3 we were using mingwm10.dll (now it is not needed and will be deleted if exists)
diff --git a/src/Makefile b/src/Makefile
index a5947b6..a6e7a78 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -38,5 +38,6 @@ setup: $(setupdep)
 clean:
 	rm -f *.o
 	rm -f $(name)
+	rm -f ttcalcp.exe
 	rm -f ../help/$(helpname)
 	rm -f ../setup/$(setupname)
diff --git a/src/compileconfig.h b/src/compileconfig.h
index 26c1ad3..9c8af9a 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		6
-#define TTCALC_PRERELEASE_VER	1
+#define TTCALC_PRERELEASE_VER	0