Circling back to your top comment, my point is that the tools to do this already exist. No new tools or freeware is needed, the exporters are already there.
The product is dead, and like any product or business that dies, yes users may have a problem with their archive. It does suck, and I feel for anyone in this situation. I guess the lesson is that this is always the risk with all software, it might lose support. It happens, often.
I don’t see any reasonable alternatives. It doesn’t seem reasonable to demand that someone ending support for a product must turn around and write a new product to continue supporting the dead product. If they’re out of money, they’re out of money, and they can’t afford to retain developers to work on it.