eM Client when opening now sits at the very left hand side of my desktop with only 3 or 4mm visible - can’t open it or drag it across the screen. I have reloaded the latest version but no change.
That can happen if the monitors configuration changed since last time eMclient was closed, for example (un)docking a laptop. See the answers to a similar question.
In brief, run eMclient (or Alt-TAB to it if already running), then Alt-Space M to enter move-mode and use the right arrow to bring the window on screen, then press ESC to end the move-mode.