Hello Dave! Apologies for the delayed response.
I installed your custom theme, but the UI still shows the icons replaced with the red cross. Interestingly, none of the themes now work, not even HighContrast.
Also the output that appears in the console has changed. It now reads:
(gramps.exe:25980): Gtk-WARNING **: Could not find the icon 'pan-down-symbolic-ltr'. The 'hicolor' theme
was not found either, perhaps you need to install it.
You can get a copy from:
http://icon-theme.freedesktop.org/releases
I went to the repository, but the files are .tar.gz, and even if they were .zip I wouldn’t know where to extract them to. Any new ideas?