Prentke Romich Company
http://www.prentrom.com/support/article/259
Word prediction will not work until you set up a user vocabulary.
In the WiViK program, select the Tools menu then select WordQ Button Bar.
From the WordQ Button Bar select Options then New User.

You see the WordQ New User screen. Click on Next.

Select the vocabulary you want to use.

Follow the instruction to pick a vocabulary and then save it under any name you want.
An electronic version of the full manual can be found at:
http://www.prentrom.com/downloads