SQL 2014 Upgrade Advisor

Hey there,

I've installed SQL 2014 Enterprise on a VM and am trying to install the Upgrade Advisor.

Directions indicate that I should run SqlUA.msi but I get the following error:
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Setup is missing prerequisites:

-Microsoft SQL Server 2014 Transact-SQL-ScriptDom, which is not installed by Upgrade Advisor Setup. To continue, install SQL Server 2014 Transact-SQL ScriptDom from below hyperlink and then run the Upgrade Advisor Setup operation again :

Go to http://go.microsoft.com/fwlink/?LinkID=296473.
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That just takes me to the download page. There is no ScriptDom file, but a further search showed me that they mean SQLDOM. So I installed SQLDOM.msi from that page above and got the following error:

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Microsoft SQL Server 2012 Transact-SQL-ScriptDom

Installation of Microsoft SQL Server 2012 Transact-SQL-ScriptDom failed because a higher version already exists on the machine. To proceed, uninstall the higher version and then run Microsoft SQL Server 2012 Transact-SQL ScriptDom Setup again.
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Well, that was pretty confusing. First I'm told I don't have it, then I'm told I'm trying to install an older version. I've rebooted the VM and my local laptop a bunch but without assist. Microsoft Support told me they don't support upgrade advisor.

Any assistance is much appreciated.
Thanks
Andre