You understand me correctly.
The OS is Windows XP Home SP3.
Right clicking on ordinary folders gives the correct Eraser Icon.
For the ZIP-files I get no icon, than the word Eraser, with a sub menu containing the phrases Erase and Erase on Restart.
Using NirSofts ShellExView I...
This minor issue shows up in Eraser version 6.07.1893 as well as 6.08.2273.
A search in this forum didn't show any more observations of this behaviour, only the issue of a missing icon in add/remove window is mentioned.