Left click no longer doing what it used to?

I posted this in the Help & Support board as well but if someone can help here that's awesome. For as long as I can remember my left-click was always used for opening the shop on game start, using it for clicking to see stats, and being able to click on a part of the map to pan over rather than unlocking and scrolling to the area. For some reason when I played on a different computer today my left-click isn't working? My friend logged in on the same computer and his worked the same as mine always had, but for my account it's different. I changed the settings back to default thinking maybe I screwed something up? Even on default it isn't working the same. I'm not sure what to change to make it work, and it kinda hurts my gameplay not being able to pan over the map as easily or being able to click to see stats. Hopefully someone can help me out?