Yes, there was a project open and I get the same effect if I open a new project.
I was not intentionally in a Wizard sequence and took the Wizard icon as a normal part of the toolbar. However, I checked program settings and 'Launch Wizard at startup' was ticked so I unticked that, closed and reopened TFP but still have the same lack of icons on the menu bar.
Strangely, icons are only missing entirely in the Building, Interiors, and Landscape bars. Terrain has some icons and some grey shapes. Layout, Settings, Tools and Analyse all have a full set of icons. Program is also taking an age to startup at times, not all, so I think I'll uninstall and reinstall and see how that goes - unless that is you would like me to hold on to the phenomenon until we solve it. Could do that for a few days as no urgency on my project at the moment. Do you want me to send you the whole file?