I noticed that MyEclipse 8.0 was trying to install 8.5. So, I uninstalled MyEclipse 8.0 and delete the C:\Program Files\Genuitek folder. I reinstalled 8.0 and ran the Add / Update Wizard, and it upgraded me to MyEclipse 8.5 with no problem. Then I selected Subclipse 1.6 from the Update Management Console, and it installed without a problem as well.
This issue is resolved as far as I’m concerned. Thanks for your help.