update jQuery to use with widget

I'm trying to upgrade a site template that uses mainly jQuery 1.08 to use 1.11, since a widget I want to connect to the subscribe form uses 1.11.

Here's the template I'm using:

http://ift.tt/1HD7NLQ

What's weird is if I use the following code, the header is there but the form doesn't work properly:

<script src="scripts/jquery-1.11.0.min.js"></script>

And if I use this code, the form works but the header disappears:

<script src="http://ift.tt/1g1yFpr"></script>

I can't use both either, because whenever I enter the second line the header disappears for some reason. What gives, can someone please help me? Thanks!