Without seeing the file, I suspected the court closed the conservatorship because the conservator did not complete a court requirement.
If you have a lawyer helping you with the probate estate, you should discuss this with your lawyer. If you do no, you may wish to hire one and go over everything having to do with the conservatorship and the decedent's estate. There may be steps that you as PR should be taking given the omissions of the conservator.
I am licensed to practice law in Michigan and Virginia and regularly handle cases of this sort. My answering your question does not establish an attorney-client relationship. You should consult a lawyer so you can tell the lawyer the entire situation and get legal advice that is precisely tailored to your case.
I agree with Mr. Conway. It is unlikely the court will do anything in relation to the conservatorship, at this point. The file would need to be re-opened, which would require a hearing and an explanation as to why things were not done in a timely manner. It sounds to me like the conservator has effectively waived her right to compensation. Why she would do so is something only she can answer.
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You should seek the counsel of your attorney, and if you are no longer represented, then find a new attorney.