I can not open any file with MovieMaker in my PC since I installed Windows Essencials 2012

Windows 7 in my O.S. and Windows Live Essentials Version 16.4.3508.0205 installed this morning.

I was working with Movie Maker in my PC, trying to use it better for my tonight presentation.
So I entered the site and clicked on the Downloading box to upgrade the Windows Essentials 2012. Since it was installed all my MovieMaker Files do not open. 
Please, I need an EMERGENCY solution for presenting them still tonight.
Lookiing forward your responsible answer.
{Removed PII for security reasons}

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