I tell every person who buys a template of any kind from me the same thing: start with your databases!
The databases of information are the single most important thing to operating these templates the way they need to operate.  Think of it like this: the program builder, with all the dropdowns and formulas and function, is only as good as the databases that it draws information from.  The program builder it self is nothing special, all it does is pull information from the databases.

That said: focus on the exercise list, max list, and program sheet before all else!  Don't begin building an actual workout until you have the program built.  If you have a platinum template, then the first thing you want to do is build the actual categories first: create your rosters, execise categories and program categories.  Only then should you start entering information, then at that point you can begin building programs!