How do I get to the workflow builder?

 I'd like to edith the timeout values for the AP invoices, actually i know what the steps are:

Open the builder
Connect to the database
Retrieve the "AP Invoice" item type
Expand it
Expand the AP Invoice
Expand the Processes
Double click on the Send Notifications process
Locate the Approval request envelope icon
Right click > Properties
Choose the NODE tab
Change the timeout from 7 days to 1 hour or whatever value you want to test using
Click OK
Repeat this for the Approval Reminder envelope
Save the changes back to the database.
Enter a new invoice and initiate to test the new flow.