If you are saying that there is a condition attaching to the equity release contract that forces sale of the property if you move out of it for more than six months, then that's it isn't it? Unless you can agree a variation. It's so that the equity company can close on its contract.
I ask the question, what happens with an equity release contract taken out by a married couple? Presumably the clause about sale of the house comes into play when BOTH parties have moved out ( care home, whatever). You appear to need a contract variation to allow this, given your change in marital status.
This question doesn't seem to me to be linked to the financing of care home fees as Buenchico assumes. It isn't the local authority that would force sale.
This is a specialist area and you may unfortunately need specialist ( paid for) advice. That's the trouble with equity release contracts, it's a specialist area.