<!-- ля-ля-ля -->
 
        <Directory Id="DataDir" Name="DATA">
          <Component Id="RemoveConfigs" Guid="!GUID2!">
            <RemoveFile Id="progdata.bin" Name="progdata.bin" On="uninstall" />
            <RemoveFolder Id="DataDir" On="uninstall" />

            <RemoveFolder Id="RemoveINSTALLDIR" Directory="INSTALLDIR" On="uninstall" /> <!-- добавить -->
            <RemoveFolder Id="RemoveCompanyDir" Directory="CompanyDir" On="uninstall" /> <!-- добавить -->

          </Component>
        </Directory>