There may be occasions when you are upgrading that you need to uninstall our extension completely. Follow these steps.

1. Disable cache
2. Remove files from app/code/<local or community>/Webshopapps relating to the extension
3. Remove the relevant .xml file from app/etc/modules
4. Run the workaround to delete the extension from the list of shipping carriers – see here
5. Verify removal on admin/frontend
6. Enable cache

All our extensions sit in the app/code/local/community/Webshopapps areas, so there is no impact on core code.