Yes it can.  At the start, all owners of the property (as reflected on title) must be signatories to the Unlock Agreement.  If you die during the term of your Unlock Agreement and you are survived by a spouse or other co-owner of your property who is also a signatory, the Unlock Agreement will continue unaffected.
If you die and you are not survived by anyone else who is a signatory, your heirs or estate will be required to settle the Unlock Agreement by either selling the home or buying Unlock out.  For this reason, it is important that you discuss your decision to enter into the Unlock Agreement with your heirs and executor during your lifetime.  They should understand the effect the Unlock Agreement can have on your estate, and if you add a spouse or domestic partner onto the title of your property during the term of your Unlock Agreement, you should notify Unlock so that person can become a signatory.
If your heirs are unable to pay the cost of buying Unlock out, they may need to sell the property to settle the Unlock Agreement.  Your heirs will have at least 180 days to settle.  Unlock may provide additional time (up to 180 days) to complete a sale process if that is the chosen settlement method.
See the Unlock Product Guide for more details.