The game runs correctly if I use the 'current resolution' of the monitor. Any attempt to use the game interface for selecting a resolution other than current for the monitor results in the same problems I was experiencing previously.
Unfortunately the native resolution of my 4k monitor (3840 x 2160) results in text too small to be legible. Downgrading the monitor resolution to 1980 x 1020, then launching the game in 'current' resolution provides playable results.
A bit cumbersome, but workable. Thank you all for the assistance.