diff --git a/NavfertyExcelAddIn/NavfertyRibbon.xml b/NavfertyExcelAddIn/NavfertyRibbon.xml
index e0f0b67..f416016 100644
--- a/NavfertyExcelAddIn/NavfertyRibbon.xml
+++ b/NavfertyExcelAddIn/NavfertyRibbon.xml
@@ -98,7 +98,7 @@
         </group>
         <group id="SecurityGroup" getLabel="GetLabel" autoScale="1">
           <button id="UnprotectWorkbook" getLabel="GetLabel" onAction="UnprotectWorkbook"
-            image="unprotectWorkbook" size="large" keytip="FP" getScreentip="GetLabel" getSupertip="GetSupertip"/>
+            image="unprotectbook" size="large" keytip="FP" getScreentip="GetLabel" getSupertip="GetSupertip"/>
 
           <button id="ProtectUnprotectWorksheets" getLabel="GetLabel" onAction="ProtectUnprotectWorksheets"
             image="unprotectWorkbook" size="large" keytip="WP" getScreentip="GetLabel" getSupertip="GetSupertip"/>
diff --git a/NavfertyExcelAddIn/Resources/findErrors.png b/NavfertyExcelAddIn/Resources/findErrors.png
index 774ff89..61902e0 100644
Binary files a/NavfertyExcelAddIn/Resources/findErrors.png and b/NavfertyExcelAddIn/Resources/findErrors.png differ
diff --git a/NavfertyExcelAddIn/Resources/highlightDuplicates.png b/NavfertyExcelAddIn/Resources/highlightDuplicates.png
index 6a4797c..3932fe6 100644
Binary files a/NavfertyExcelAddIn/Resources/highlightDuplicates.png and b/NavfertyExcelAddIn/Resources/highlightDuplicates.png differ
diff --git a/NavfertyExcelAddIn/Resources/parseNumerics.png b/NavfertyExcelAddIn/Resources/parseNumerics.png
index d83cc1e..1807a71 100644
Binary files a/NavfertyExcelAddIn/Resources/parseNumerics.png and b/NavfertyExcelAddIn/Resources/parseNumerics.png differ
diff --git a/NavfertyExcelAddIn/Resources/stringifyNumerics.png b/NavfertyExcelAddIn/Resources/stringifyNumerics.png
index 2e7937b..4033386 100644
Binary files a/NavfertyExcelAddIn/Resources/stringifyNumerics.png and b/NavfertyExcelAddIn/Resources/stringifyNumerics.png differ
diff --git a/NavfertyExcelAddIn/Resources/stringifyNumericsEn.png b/NavfertyExcelAddIn/Resources/stringifyNumericsEn.png
index e14e15b..110d055 100644
Binary files a/NavfertyExcelAddIn/Resources/stringifyNumericsEn.png and b/NavfertyExcelAddIn/Resources/stringifyNumericsEn.png differ
diff --git a/NavfertyExcelAddIn/Resources/stringifyNumericsFr.png b/NavfertyExcelAddIn/Resources/stringifyNumericsFr.png
index 534d59d..711be8b 100644
Binary files a/NavfertyExcelAddIn/Resources/stringifyNumericsFr.png and b/NavfertyExcelAddIn/Resources/stringifyNumericsFr.png differ
diff --git a/NavfertyExcelAddIn/Resources/stringifyNumericsRu.png b/NavfertyExcelAddIn/Resources/stringifyNumericsRu.png
index ccad0b5..d067689 100644
Binary files a/NavfertyExcelAddIn/Resources/stringifyNumericsRu.png and b/NavfertyExcelAddIn/Resources/stringifyNumericsRu.png differ
diff --git a/NavfertyExcelAddIn/Resources/trimSpaces.png b/NavfertyExcelAddIn/Resources/trimSpaces.png
index b79b452..135d70b 100644
Binary files a/NavfertyExcelAddIn/Resources/trimSpaces.png and b/NavfertyExcelAddIn/Resources/trimSpaces.png differ
diff --git a/NavfertyExcelAddIn/Resources/unmergeCells.png b/NavfertyExcelAddIn/Resources/unmergeCells.png
index 2389e52..7a5eba7 100644
Binary files a/NavfertyExcelAddIn/Resources/unmergeCells.png and b/NavfertyExcelAddIn/Resources/unmergeCells.png differ
diff --git a/NavfertyExcelAddIn/Resources/unprotectbook.png b/NavfertyExcelAddIn/Resources/unprotectbook.png
new file mode 100644
index 0000000..d33771d
Binary files /dev/null and b/NavfertyExcelAddIn/Resources/unprotectbook.png differ
diff --git a/NavfertyExcelAddIn/RibbonIcons.resx b/NavfertyExcelAddIn/RibbonIcons.resx
index dd347bf..cfa30fd 100644
--- a/NavfertyExcelAddIn/RibbonIcons.resx
+++ b/NavfertyExcelAddIn/RibbonIcons.resx
@@ -169,6 +169,9 @@
   <data name="unmergeCells" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>Resources\unmergeCells.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
+  <data name="unprotectbook" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>Resources\unprotectbook.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
   <data name="unprotectWorkbook" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>Resources\unprotectWorkbook.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>