Lost My Custom Styles

I was having a problem with C1 21 crashing.  After weeks of going back and forth with Support I followed their instruction to do a clean uninstall.  The only problem is that when I reinstalled the program all of the Custom Styles I had purchased are gone.  They aren't anywhere on my hard drive.  Anyone know where I can go to find proof of what I purchased so that I can get them back again?