Corrupted Formula Input Window

My installation of Lotus 8.5.1 does not allow me to edit computed values (for example an outline entry).

This occurs when I want to use ANY Input Formula Window.

i.e. hide when formulas (can see/edit if I don’t click Formula Window button)

Outline entry computed values

Frame computed values etc

I have tried a clean install of lotus notes but it still occurs.

I have tried creating a notes 8 database (ODS=48), but it still occurs.

Any advice would be really appreciated

Thanks in advance

Sea