Can I downgrade from Pro to Basic, then re-subscribe months later?

[JerEd]

Hello,

If I'm on a monthly paid Pro plan and I cancel back to the free Basic plan, can I return 3 months later to the monthly paid Pro plan? If so, is it true that the additional functionality of Pro is lost, and then must be added back in from new again, but what is contained in Basic always stays?

Finally, is there a limit to how often I can transfer back and forth (for example, 6 months on paid Pro, and then 6 on free Basic, repeating)?

Thanks very much for your help!