Hmmm..first of all (I of course think buying ODNT is a very good idea) Star Dock Central should be installed no matter what you have installed and will not require a re-install if you buy ODNT. If you bought WC BRowser, you will not have to un-install that either. Everything else must be un-installed (don't forget to re-boot between un-installs and re-installs). You will get an e-mail with your serial #s and download links. You can go in two directions at this point. You will need to copy/paste your serial #s in SDC in Registration Info (lower right corner) and make sure you click on all tabs, so you can enter your WC Browser serial # (and anything else you may have bought). The 2nd way is to follow the e-mail links and download from there (it will ask for serial #s) and then update proggies thru SDC from there on. (either way
you must enter serial #'s in SDC). Control Center is not SDC and it comes with ODNT and if you installed it then un-install it as noted above. I have a feeling that your cookies are going to go wacko when you do this so make sure you log out of Stardock after putting in serial #'s and before starting the proggie installs and kill the 3 SD cookies. This will do it....
do not click on it until you log out and have your SDC serials in and applied. https://www.wincustomize.com/killcookies.asp After the cookies are gone log back into SDC and install or update (which ever way you chose to do...before you ask...yes, I would just install everthing from SDC and not bother with the links!!)
Good Luck