Computers and Software : Issue with Adobe Premiere?

Issue with Adobe Premiere?

I was editing a video a while back and I used to be able to double-click on the clip and it would bring a zoom/stretch box to make the clip bigger, smaller, move it around, ect. Well one day while doing this, the program crashes and I haven't been able to do this ever since. When I upload a huge picture and want to shrink down to fit the screen full frame, I can no longer do it. Same goes for footage. Does anyone know how to fix this?
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