Is it possible to restore paid Language Weaver subscription to free version?

Trados Studio users have 6 million FREE NMT characters per year, per account. However, new upgrade options (paid subscription) are available in the Language Weaver account.

Let's say that you've exceeded 6 million free NMT characters per year and purchased additional 1,000,000 characters ("Starter Monthly" subscription).

QUESTION: can you return to free 6,000,000 characters per year after you use up 1,000,000 characters? What happens after you cancel your paid subscription?

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