Image snaps to left of screen.
Hi,
I have Photoshop CS5 Extended - Version 12.0.4 x 64.
I’ve been using this on my 27” iMac desktop for the past 6/7 years without a problem, but just in the last week, any image I open in PS is locked on the lefthand side of my home screen. I try to move it with my mouse on the top grey bar of the image but it keeps snapping back to the top left and I can't centralise the image as I use to. It's very frustrating and hope someone can help me.
I'm using OS X El Capitan, version 10.11.6 and have been for over a year.
Help Please
I've enclosed a capture of my home screen

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