IDE Configuration
The Appercept AWS SDK for Delphi provides a configuration editor integrated into the Delphi options dialog. Open Tools > Options... and you will find Appercept AWS SDK listed under Third Party.

This dialog will update your Shared Configuration and Shared Credentials within your user profile. The configuration is common to all AWS SDKs.
Default Profile
Within the IDE, you can mark a profile as the Default. The Default profile can be any profile, not just the AWS SDK default named "default". The purpose of the IDE Default profile is to be able to switch between profiles within the IDE and any debug sessions. When you Run (F9) your projects using the AWS SDK, the profile marked as Default is used.