UPDATE:
The new Chairman of the Board of the Holding company asked me if I have any access that will help him (besides my own password which is, maybe, not yet invalid, I don't know). I told him that, since I'm no longer an employee of the company, that I needed legal protection before I attempted to enter a corporate network that I no longer have authority to access. I'm no longer an employee, so any ingress is a violation of a lot of US Federal laws.
I told him that I would retrieve the passwords file without any payment (they owe me $8K) assuming my password was still valid, but any additional work besides providing the file and its password was at $150/hr. I feel that it's what I would have done at the termination of my employment (if there had been someone to turn it over to). I provided him with my standard consulting contract with the above provisions.
He replied that the bank accounts are locked so he can't pay me. I told him that this is just about the file that he wants and I just need legal protection to enter the network.
I've not heard back from him.
Note: I did, independently, confirm that he's actually taken over the above shit show.