Abobe Dreamweaver CC Classroom in a book - Support files

This is all sort of moot given that DW CC 2014 is no longer available from Creative Cloud desktop app. 

Go to www.peachpit.com/redeem and enter the unique redemption code from your book.

Out of curiosity, do you still have a copy of the DW CC2014 program itself ?

If not, you're going to end up wanting to throw that book through your monitor pretty quickly, if you try to use it with CC 2020. The latset version of DW is very different from what was available in CC2014.

Live View Editing, Brackets Code View, 6 years of menu changes for change's sake and a bunch of other things lead me to suggest getting rid of the book, unless you actually have CC2014 installed.