diff --git a/Contrib/Modern UI/Language files/Czech.nsh b/Contrib/Modern UI/Language files/Czech.nsh
index 835703a0..644bddb1 100644
--- a/Contrib/Modern UI/Language files/Czech.nsh	
+++ b/Contrib/Modern UI/Language files/Czech.nsh	
@@ -57,6 +57,8 @@
   !insertmacro MUI_LANGUAGEFILE_STRING MUI_TEXT_ABORTWARNING "Opravdu chcete ukončit instalaci programu ${MUI_PRODUCT}?"  
 
 
+  !insertmacro MUI_LANGUAGEFILE_STRING MUI_UNTEXT_CONTINUE_UNINSTALL "Klikněte na Odinstalovat pro spuštění odinstalace."
+
   !insertmacro MUI_LANGUAGEFILE_STRING MUI_UNTEXT_INTRO_TITLE "Odinstalování programu ${MUI_PRODUCT}"
   !insertmacro MUI_LANGUAGEFILE_STRING MUI_UNTEXT_INTRO_SUBTITLE "Odstranění programu ${MUI_PRODUCT} z Vašeho systému."
   !insertmacro MUI_LANGUAGEFILE_STRING MUI_UNINNERTEXT_INTRO "Tímto odinstalujete program ${MUI_PRODUCT} z Vašeho systému."
diff --git a/Contrib/Modern UI/System.nsh b/Contrib/Modern UI/System.nsh
index 7a71947a..284c82c6 100644
--- a/Contrib/Modern UI/System.nsh	
+++ b/Contrib/Modern UI/System.nsh	
@@ -1709,7 +1709,12 @@
   !ifndef "${INSTALLBUTTON}"
     ${COMMAND} "${${NAME}} ${MUI_TEXT_CONTINUE_NEXT}"
   !else
-    ${COMMAND} "${${NAME}} ${MUI_UNTEXT_CONTINUE_UNINSTALL}"
+    !ifdef MUI_UNTEXT_CONTINUE_UNINSTALL
+      ${COMMAND} "${${NAME}} ${MUI_UNTEXT_CONTINUE_UNINSTALL}"
+    !else
+      ;Modern UI 1.61 Language File compatibility
+      ${COMMAND} "${${NAME}}"
+    !endif
   !endif
   
   !undef "${NAME}"
@@ -1820,13 +1825,8 @@
     !insertmacro MUI_LANGUAGEFILE_UNLANGSTRING "MUI_UNTEXT_FINISHED_SUBTITLE"
   !endif
   
-  !ifdef MUI_TEXT_CONTINUE_NEXT
-    !undef MUI_TEXT_CONTINUE_NEXT
-  !endif
-
-  !ifdef MUI_TEXT_CONTINUE_INSTALL
-    !undef MUI_TEXT_CONTINUE_INSTALL
-  !endif
+  !undef MUI_TEXT_CONTINUE_NEXT
+  !undef MUI_TEXT_CONTINUE_INSTALL
   
   !ifdef MUI_UNTEXT_CONTINUE_UNINSTALL
     !undef MUI_UNTEXT_CONTINUE_UNINSTALL
diff --git a/Examples/Modern UI/MultiLanguage.nsi b/Examples/Modern UI/MultiLanguage.nsi
index 93246306..6db34f40 100644
--- a/Examples/Modern UI/MultiLanguage.nsi	
+++ b/Examples/Modern UI/MultiLanguage.nsi	
@@ -44,7 +44,6 @@
   !insertmacro MUI_LANGUAGE "Italian"
   !insertmacro MUI_LANGUAGE "Dutch"
   !insertmacro MUI_LANGUAGE "Danish"
-  !insertmacro MUI_LANGUAGE "Polish"
   !insertmacro MUI_LANGUAGE "Greek"
   !insertmacro MUI_LANGUAGE "Russian"
   !insertmacro MUI_LANGUAGE "PortugueseBR"
@@ -69,9 +68,8 @@
   LangString DESC_SecCopyUI ${LANG_ITALIAN} "modern.exe: Italian description"
   LangString DESC_SecCopyUI ${LANG_DUTCH} "modern.exe: Dutch description"
   LangString DESC_SecCopyUI ${LANG_DANISH} "modern.exe: Danish description"
-  LangString DESC_SecCopyUI ${LANG_POLISH} "modern.exe: Polish description"
   LangString DESC_SecCopyUI ${LANG_GREEK} "modern.exe: Greek description"
-  LangString DESC_SecCopyUI ${LANG_RUSSIAN} "modern.exe: Greek description"
+  LangString DESC_SecCopyUI ${LANG_RUSSIAN} "modern.exe: Russian description"
   LangString DESC_SecCopyUI ${LANG_PORTUGUESEBR} "modern.exe: Portuguese (Brasil) description"
   LangString DESC_SecCopyUI ${LANG_UKRAINIAN} "modern.exe: Ukrainian description"
   LangString DESC_SecCopyUI ${LANG_CZECH} "modern.exe: Czechian description"
@@ -93,7 +91,6 @@
   LicenseData /LANG=${LANG_ITALIAN} "${NSISDIR}\Contrib\Modern UI\License.txt"
   LicenseData /LANG=${LANG_DUTCH} "${NSISDIR}\Contrib\Modern UI\License.txt"
   LicenseData /LANG=${LANG_DANISH} "${NSISDIR}\Contrib\Modern UI\License.txt"
-  LicenseData /LANG=${LANG_POLISH} "${NSISDIR}\Contrib\Modern UI\License.txt"
   LicenseData /LANG=${LANG_GREEK} "${NSISDIR}\Contrib\Modern UI\License.txt"
   LicenseData /LANG=${LANG_RUSSIAN} "${NSISDIR}\Contrib\Modern UI\License.txt"
   LicenseData /LANG=${LANG_PORTUGUESEBR} "${NSISDIR}\Contrib\Modern UI\License.txt"
@@ -154,7 +151,6 @@ Function .onInit
   !insertmacro MUI_LANGDLL_PUSH "Italian"
   !insertmacro MUI_LANGDLL_PUSH "Dutch"
   !insertmacro MUI_LANGDLL_PUSH "Danish"
-  !insertmacro MUI_LANGDLL_PUSH "Polish"
   !insertmacro MUI_LANGDLL_PUSH "Greek"
   !insertmacro MUI_LANGDLL_PUSH "Russian"
   !insertmacro MUI_LANGDLL_PUSH "PortugueseBR"
@@ -165,7 +161,7 @@ Function .onInit
   !insertmacro MUI_LANGDLL_PUSH "Romanian"
   !insertmacro MUI_LANGDLL_PUSH "Macedonian"
   
-  Push 20F ;20 = number of languages, F = change font
+  Push 19F ;19 = number of languages, F = change font
 
   LangDLL::LangDialog "Installer Language" "Please select a language."