How to make free trial version

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STEP 1
===================================================================================
Add:

-----------------------------------------------------------------------------------
<div style="text-align:center;color:red;margin:5px;">FREE TRIAL VERSION</div>
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to:

tas/admin/mod/auth/tpl.login.inc.php

(Example)
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//==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<
	$lca = CEnv::locale("auth/login");
	$lca_app = CEnv::locale("app/info");
?>
<div style="text-align:center;color:red;margin:5px;">FREE TRIAL VERSION</div> <==========Here
<form class="ctar-form">
	<div class="panel panel-primary">
		<div class="panel-heading">
-----------------------------------------------------------------------------------

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STEP 2
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Replace:

pksurl/lib/app/CRedirector.class.php

with

the obfuscated file:
my-projects/shorturl/SUMCX-225/public_html/free-trial-version/obfus/result/CRedirector.class.php

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About

//==>>>==>>>==>>>==>>>==>>>==>>>==>>>==>>>==>>>==>>>==>>>==>>>==>>>
//
// pkShortURL V2.25 [ FREE TRIAL VERSION ]
// Copyright (c) phpkobo.com ( http://www.phpkobo.com/ )
// Email : admin@phpkobo.com
// ID : SUMCX-225
// URL : http://www.phpkobo.com/short_url.php
//
//==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<==<<<