Lightroom 4 won't open "assertion failed!"

Hello,
I have Lightroom 4 and as soon as I click to open the lightroom 4 application and message box pops up saying "assertion failed!" and then it doesn'tt open the program. I was working earlier but then my laptop has a bad battery and when I was editing in lightroom 4 my laptop shut off without warning (same thing as just pulling the power cable out of the outlet of a desktop when its on without shutting it off first). But anyways I have windows 7 and was hoping someone has a solution to this problem so I can get back to work. I was also hoping that I could fix this issue without erasing all the editing I did and all the pictures I have in lightroom.
Thanks,

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