On import in Lr, all my .dng files are being converted to Studio 2?


I import my photos using Lr 5. The photos for import are .dng and .jpegs files. Previously, Lr had no problems importing the .dngs, and the image appeared in preview. Now, when I click Import in Lr, the selected .dng files show up as Studio 2 icons and there is no image. It’s like Studio 2 has become the default converter. I don’t want this. I tried erasing Studio 2 from my presets in Lr, but I can’t seem to fix this. Help is appreciated!