The link stays active for 1 month from the time of purchase, after which, it expires. If you click on the activation link after expiration, you will automatically receive a new activation link via email.
If you cannot find your original welcome email with the account activation link, simply contact Mulberry via phone, email or live chat.
Mulberry Support:
Live Chat: getmulberry.com
Email: help@getmulberry.com
Phone: 917-994-6394