Keyboard Shortcuts Greyed out since update to 10.3.1720

Hi, since upgrading to 10.3.1720 the keyboard shortcuts are all greyed at as per the attached image. This is one Mac OS X 15.4.1

The only way to paste text now is to right click with the mouse and select paste from that menu.

I have confirmed that it is only in eM Client and no other application. I have also done all the restarts, reboots and all other normal and obvious things.

Any help is appreciated, thanks