Add second way of determining use of preupdate-url

setup/KetarinSettings.xml

@@ -242,6 +242,7 @@
           <string>System.String:REM https://chocolatey.org/packages/chocolateypackageupdater
 SET URL={url}
 IF '%URL%'=='' SET URL={preupdate-url}
+IF '%URL%'=='{url}' SET URL={preupdate-url}
 chocopkgup {nopush} {force} --pf="{autoPackagesFolder}" --packagename="{appname}" --version="{version}" --url="%URL%" --urlx64="{url64}" --checksum="{checksum}" --c64="{checksumx64}" --debug</string>
         </value>
       </item>