Every module in your package runs together in one full run, after you buy a package. There's no separate button for each module.
Start the full run
Buy a package from the Reports tab (see "How do I buy a package?").
You're brought back to Project Setup. Review your Brief and files and make any changes.
On Clarify, click Run the full analysis (Modules 1 to [N]).
The full run starts again from Module 1, using your updated answers and files, and continues through the last module in your package.
How long it takes
A full run takes a couple of hours. You don't need to stay: close the tab and come back later. Progress is kept on the project, and the Projects page shows how far the run has got.
While it runs
Modules run one after another, because each reads the output of the ones before it. Each starts the moment the previous one finishes.
The Modules tab shows each one as Running, Not started, or Complete, with a time estimate for the one in progress.
Modules outside your package show Not in your package, with an option to upgrade.
When it finishes
You'll see All modules are done. Your reports are ready. Your reports are generated automatically; click Review your reports or open the Reports tab.
If a module fails
The run stops at that module and the project shows Run failed at Module [N] · resume to continue. Resume from the Modules tab; modules that already finished aren't repeated.