Can I find the install packages on my computer after installing through CCC? Where are they so I can back them up?

Found them in Program Data/Cakewalk/Command Center 

Sounds like your downloads location reset to default.  Click on the gear icon, then paths tab.  Change your settings, then Save.
 
Of course, best to do this before the installation.  If it already installed in the wrong place, you can either uninstall and start over -- or use symbolic links to redirect your data (Do a search for scook's excellent instructions on how to do this).

You can do it afterwards, doesn't matter. The path you set in CCC is wher they will go. I changed the path myself more than a year ago. You can have them wherever you want. You don't need any magic, just copy the files to your new download folder you set in the path. Simple!