Yes! If you complete a DEDP MicroMasters course on the Audit (free) enrollment track, you may re-enroll in a future session of that course, submit payment to upgrade to the Verified/Certificate (Paid) enrollment track, either re-do all of the coursework or import the Course Score from your Audit session, and sit for the Proctored Exam at the end of the semester.
Please carefully review the information in the FAQ article Can I Enroll in DEDP Courses Now and Submit Payment Later? for important details!