Tutorials 3 and 4 Missing After "Complete" Installation

I recently installed Alice 2.0 on a Windows XP SP3 machine using the disc that came with the textbook. I ran the Complete installation package and have plenty of space on my HDD. However, when I run the Tutorials, I only see Lessons 1 and 2. Lessons 3 and 4 are not there.

My instructor mentioned that 3 of my classmates also had this same problem and he didn't know what was causing it. I don't see any mention of it in the Community Forums either. Is there a known bug or issue involving this situation? And, is there a workaround or patch to fix it?

Thanks in advance for your help,
-Robert