
After a huge problem installing OC, i decided to get rid of everything and start all over

So, i've deleted all files from my server. But the folders images/cache and image/data are still on my server. Trying to remove them gives a "Permission denied" error on all files. I've tried to reset the owner, but with no result at all.
How do I remove these folders?
I had removed the demo-articles that are installed with a new install, but even these images are still in these folders. So removing the article from the shop doesn't remove the images from the server!

Since we have a constantly changing collection of products, this can become a problem in future. The sizes of these folders will become huge if all old images are kept, so a solution would be highly appreciated!!
