I uninstalled Lr2.7, now my Lr3 is EMPTY!

i upgraded lr2.7 3.2 no problems months. uninstalled 2.7 , images , files gone! not " offline or missing", have no images @ all! (according lightroom)  still scattered on hard drives, no longer in lr. , seems dng files have reverted nef (nikon raw).  help.

have inadvertently created new empty catalog? check in recent catalogs.

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