There are several kinds of "history" stored by Konqueror.
- The location bar combobox items and completion: you can clear those with right-click, "Clear History".
- The history module in the sidebar: you can clear it with a right-click on one of the host names, and selecting "Clear History".
- The HTTP cache (known as "Temporary Internet Files" in other environments) can be cleared in the KControl module called "Cache", using the "Clear cache" button on the bottom right.
File locations (~/.kde is only an indication. Your distributor, or $KDEHOME, could have modified that value) :
- Combobox items: ~/.kde/share/config/konq_history
- History module and combobox completion: ~/.kde/share/apps/konqueror/konq_history (binary file)
- HTTP cache: ~/.kde/share/cache/http/ (previously in ~/.kde/share/apps/kio_http/cache/)