The current version running here is mentioned numerous times in the html coding, view the page source of any UBB page and you'll see it (just showing lines it occurs):
Code
	<meta name="generator" content="UBB.threads 7.5.7" />
	<link rel="stylesheet" href="/forums/styles/common.css?v=7.5.7" type="text/css" />
	<link rel="stylesheet" href="/forums/styles/Ubb_1383272274.css?v=7.5.7" type="text/css" />
	<script type="text/javascript" src="/forums/ubb_js/ubb_jslib.js?v=7.5.7"></script>
	<script type="text/javascript" src="/forums/ubb_js/image.js?v=7.5.7"></script>
	<script type="text/javascript" src="/forums/ubb_js/quickquote.js?v=7.5.7"></script>

As for the version of the new build; we'll know when it's released.

I am a Web Development Contractor, I do not work for UBBCentral. I have provided free User to User Support since the beginning of these support forums.
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