Just tested XP and XP64. Overwrite Popup appears on both (same as you report here for Win8). Personally, I don't like the idea of CUETools permanently overwriting files. The temporary (per-run) setting is fine.
I always create a unique log file so I can compare results.
%filename%[' ('%unique%')'].accurip
I always create a unique log file so I can compare results.
%filename%[' ('%unique%')'].accurip