You can use Terminal to completely remove an application from your computer. Use the Finder and look for Terminal. Start it and type
mdfind -name "application name". In the application name, type CNET. After all the results related to CNET are displayed, use the following command:
sudo rm -rif PATH. Replace PATH with the search results from previous command. Reboot after this operation, and the CNET will be removed from your Mac.