Remove the Repair button from Programs and Features. Fix the CA.

installer/src/msi/adblockplusie.wxs

 <?xml version="1.0" encoding="UTF-8"?>
 <!--
   Compilation Note:
   You may see linking errors that look like these:
     <quote>LGHT0217 : Error executing ICE action 'ICExx' [...] The error code is 2738.</quote>
   The documentation for this error code talks about custom actions,
     even though the CustomAction keyword does not appear in this source.
   Certain WiX elements are implemented by MSI custom actions,
     which means this source implicitly declares some insofar as the Windows Installer sees it.
   These errors are benign and can be avoided by some fiddling with the registry on the development machine.
@@ skipping 170 matching lines @@
       Title="!(loc.Title)" Description="!(loc.UI_Description)"
       Display="hidden">
       <ComponentGroupRef Id="Installation_Folders"/>
       <ComponentGroupRef Id="Binaries"/>
       <ComponentGroupRef Id="HTML_Tree"/>
       <ComponentGroupRef Id="Locale_Files"/>
       <ComponentGroupRef Id="INI_Files"/>
     </Feature>
 
     <!--
-      Remove the "Modify" button from our control panel entry.
-      Since we only have a single feature, there's only a single way of installing the plugin,
-        and thus modifying the installation can't possibly do anything.
-      This is currently set by the WiXUI property WIXUI_INSTALLDIR, so it's commented out now.
-      <Property Id="ARPNOMODIFY" Value="1"/>
-     -->
-
-    <!--
       The application data folder has to vary by operating system version.
       With Vista and later, we have to use an application data folder suitable for low-integrity applications.
       XP and earlier don't have UAC and we use the regular application data folder.
     -->
     <Property Id="LOCAL_LOW_APP_DATA_FOLDER">
       <!-- There's no built-in property with this name, so we need to extract its value from the registry. -->
       <RegistrySearch Id="RUMK"
         Root="HKCU" Key="Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
         Name="{A520A1A4-1780-4FF6-BD18-167343C5AF16}"
         Type="raw"/>
@@ skipping 615 matching lines @@
         <Component Id="ini_settings.ini" Guid="dc30c3b0-d713-11e2-8b8b-0800200c9a66">
           <File Name="settings.ini"/>
         </Component>
       </Directory>
     </DirectoryRef>
 
     <?include ../installer-lib/custom-i18n.wxi ?>
     <?include ../custom-action/close_ie.wxi ?>
   </Product>
 </Wix>