Glad to help. I mostly give advice like this because I'm keenly aware that when I was young and stupid I was often a doormat in e.g. dealing with companies, and despite years of socialization which had suggested to me that being a doormat was praiseworthy, things started to get better in a hurry after I abandoned my default presumption of doormathood.
In your future professional dealings, and those of the peanut gallery, you may find that people often just expect you to agree to their terms because it's easy, and that this is sometimes not in your interest. I've done my fair share of that, and had it blow up in my face once or twice, and almost blow up in my face a few other times.
Not to talk too much of the particulars, but I once signed a fairly straightforward contract which had straightforward terms which I thought I understood. In my ignorance, I did not understand that one paragraph -- which I thought was "the usual boilerplate" -- obligated me to do something which would have been very against my interest. That situation ended up getting resolved amicably, but older and wiser consultants (and my lawyer), when told what I signed, have all the blood drain out of their face.
In the instant case, you've just been dealt a bum hand by an employer, and based on their previous conduct I would not advance them bus fare, to say nothing of going out of my way to help. That "release" might include, hypothetically, an indemnification, a term which sounds almost synonymous to programmers. It isn't. Your competent legal representative would, if they read "indemnification", say Oh Hell No. There are probably even worse terms that could potentially be in there that I'm not even sufficiently creative to dream up.
Why affirmatively ask for that sort of risk by signing a contract which gives you no upside at all? You don't owe them any more than declining politely and asserting that paying your for services rendered is not optional. Asserting yourself there probably isn't nearly as costly in real life as you might be modeling it as.
Anyhow, stuff to keep in mind for next time, and for those in the peanut gallery who might eventually be given a similar ultimatum.
Also, comporting yourself like a Serious Businessman who does Serious Business (like contracts) only when doing Serious Business routine things like asking for a contract review from an actual honest-to-6-minute-billing-increments attorney sends a strong signal to would-be counterparties that they should not attempt to take liberties with you.