Acrobat dc - unknown app keeps opening & closing in dock

i'm using acrobat dc and an app keeps opening & closing in the dock constantly when i use it. it keeps taking mouse pointer focus away from acrobat & it's frustrating.
i can't hover over the dock icon fast enough to see what it's called.
anyone else notice this?
what is the app & how to I stop it from opening?
thanks

thanks for getting back:)
mac os x 10.10.3
acrobat dc
I did try uninstalling / reinstalling acrobat dc. how to i 'repair' acrobat?
looks like the app is called 's4c' and it has a generic OS X application icon. it's so hard to get a screenshot because it opens & closes so fast.
thanks!

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Acrobat dc - unknown app keeps opening & closing in dock

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