Is it possible to insert HTML content in XML config file?

I have my software for Windows, the Login to the account linked to URL server.
The code of the config (stored LOCALLY at C:\Program Files) is:

<?xml version="1.0" encoding="utf-8"?><configuration><startup> <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2"/></startup><appSettings><add key="MAIN_URL" value="http://*.*.*.*:8080/"/><add key="REMOTEDEBUGGINGPORT" value="7999"/><add key="MESSAGE_LANG"/><add key="SET_API" value="http://*.*.*.*"/><add key="SET_API_PORT" value="7001"/></appSettings></configuration>

At the URL the code of the HTML is:

<div class="login-wrapper"><div><form class="form" role="form" id="login-form"><h3 class="text-center">Hello</h3><div class="form-group"><input type="text" class="form-control" id="UserId" name="UserId" dir="ltr" placeholder="Username" value="" /></div><div class="form-group"><input type="password" class="form-control" id="Password" name="Password" dir="ltr" placeholder="Pass" value="" /></div><div class="form-group"><input type="text" class="form-control" id="Extention" name="Extention" dir="ltr" placeholder="Ext" value="" /></div><div class="form-actions"><button type="button" class="btn btn-block btn-primary" id="btn-login">Login</button></div></form></div>

I want to change the title instead 'Hello' to 'User Area'.
But i want to change it ONLY at the software and NOT at the URL directly.

<h3 class="text-center">Hello</h3>

How i can to write the HTML code At the config XML file who stored LOCAL in the computer?
Hope for help soon.
Thanks.