If you are re-purposing your Mac or if you encountered a problem with SoftBlock and need to re-install the software, it is important to remove all SoftBlock components from your Mac.
Below is the list of SoftBlock components and their location. Double check all 11 files have been removed and reboot the computer before re-purposing the Mac or before installing SoftBlock again.
Note: If you are re-installing SoftBlock on High Sierra or Mojave, please follow instructions from this article "Installing SoftBlock 1.1.0 on High Sierra or Mojave".