Cisco Any Connect VPN Client Install/Uinstall Error

I recently had issues with my Cisco Any Connect VPN client stop working on a MacBook Pro 13" Retina. I downloaded the client and tried to install again. I kept getting error message "AnyConnect secure mobility client cannot be installed on this disk. Version 3.1.xxxx of the Cisco AnyConnect secure mobility client is already installed". I decided to uninstall and reinstall a fresh copy. I continued to get the same error. I Clean My Mac 2 to uninstall the client to make sure nothing was left behind. The message still was promoted as I tried to reinstall. I found a few articles with different things to try. First thing is to make sure you have root user enabled. You can do this by following the directions below. 

• From the Apple menu choose System Preferences.

• From the View menu choose Users & Groups.
• Click the lock and authenticate as an administrator account.
• Click Login Options.
• Click the "Edit..." or "Join..." button at the bottom right.
• Click the "Open Directory Utility..." button.
• Click the lock in the Directory Utility window.
• Enter an administrator account name and password, then click OK.
• Choose Enable Root User from the Edit menu.
• Enter the root password you wish to use in both the Password and Verify fields, then click OK.

I had issues with the above directions having parts being greyed out. I used this alternative option.

• From Terminal when logged in as an admin user. 
• dsenableroot to enable, 
• dsenableroot -d to disable

Now you are ready to use terminal to uninstall the client successfully to reinstall.

• Open Terminal and do the following:
  • su (be careful when giving yourself root, of course)
  • cd /opt/cisco/anyconnect/bin
  • ls (to see if there's a vpn_uninstall.sh file)
• If there is, then run the following command:
  • sh vpn_uninstall.sh
• You'll get this confirmation message in the Terminal:
  • Successfully removed Cisco AnyConnect Secure Mobility Client from the system.

Now go back to your .dmg or vpn.pkg file (whatever your source for installing is).  Now when you get to the Destination part, you should get no error and you can proceed with the installation.