Hi Stevanic,
you should configure your IAM user roles, as described here:
CAL FAQ - Specific questions for Amazon Web Services
Is is possible to use an IAM role instead of the root AWS account?
Yes, this is possible. As the first step please create a new group in IAM and then add the following four roles to it: AmazonEC2FullAccess, AmazonVPCFullAccess, ReadOnlyAccess and AWSAccountUsageReportAccess. Once done create a new user in this group and generate the credentials for this new user. You can now use these credentials in CAL.
Could you please let us know if you still struggling issues with CAL.
P.S. Please check in your AWS account if you have any started instance and let us know. You shouldn't have any, started from CAL.
Thanks and nice weekend.
Aleksandar