After upgrade - demo images?

Hi,

I noticed when I upgraded from 1.5.2 to 1.5.2.1 that all the demo images for computers and cameras were back in my images folder and cache folder. I upgrading by using installatron on cpanel.
I this going to happen every time I upgrade? What can I do to prevent this?

Thanks,
M

If manual uploading, dont add the image folder. Else, there's no way.