Okay, 1 problem down, 1 to go...
So I disabled my security software and it allowed the activation to go through. However, I am still unable to import the midnight oasis layout. What I do is:
1. Open up a blank page in Dreamweaver CS4
2. Go to Insert>WebAssist>SiteAssist Professional>Build Site
3. Choose Online Store from the first window
4. Then once I get to the layout window, select import, find the zipped midnightoasislayout.zip file, and click okay.
It says it's not a valid SiteAssist Professional Layout.