Each subscription offers Dashboard Snapshots and Detailed Project Analysis, but as you progress in the subscriptions, you get so much more. Upgrades are prorated, but we do not prorate for downgrades. You may not be able to downgrade, if you have too many projects to meet the lower subscription limit. Be aware of your total number of projects.
To find the latest pricing plans available, view the pricing information here, or simply view the billing information if you are administrator for your organization.