Delete Shortcut Issue

I am fairly new to blender, so I may seem a bit dumb posting this, but I am having a slight issue with the Delete shortcut. I somehow accidentally changed the Delete shortcut key from ‘x’ to left-click, and I can’t seem to change it back. Due to this I can’t move any objects.

Can anyone help?

RMB on the delete menu entry and select Change Shortcut, set it to X

If that doesn’t work.
Go to File / User Preferences / Input, search for Delete
Under Object mode expand the option that uses the left mouse, select Keyboard and the shortcut to X
Then press the Save User Settings button

or
File / Load Factory Settings

or
If you haven’t saved LMB as your default keymap, try just re-opening your blend file

Thanks man, really helped!