For some reason, my .zip, .dmg and other archive files are being moved to my trash without my consent whenever they're decompressed. I do NOT want this to happen. How can I prevent this?
That option only removes the download items in your download List, not any downloaded items.
But if you notice in that window you can uncheck 'Open 'safe' files after downloading, it will stop trashing your items BUT won't decompress them either.
For some reason, my .zip, .dmg and other archive files are being moved to my trash without my consent whenever they're decompressed. I do NOT want this to happen. How can I prevent this?
Possible issue - StuffIt set up to delete after expanding.
For files open by default by StuffIt: In the APPLICATIONS folder, find the StuffItNN and open it. Run the StuffIt Expander.app and go to preferences - under Expansion, UNcheck "delete after expanding."
Can't say the same for DMGs unless it was the Safari download-open-delete option issue explained earlier.