The manual says:
If you wish to remove the lines added to the system hosts file by jv16 PowerTools, you can do this from the Backup Tool (Tools menu > Windows hosts file > Remove all lines added by jv16 PowerTools).
Actually you have to do the following:
- 1) Go to "Backups" (Backup Tool)
2) Go to the "Tools" menu
3) Go to "Immunize My Computer"
4) Click on "Undo Immunization..."
That's it.