From the cite you posted:
(4) When the claim becomes enforceable (which as you say is after the 90 days), the obligated bank becomes obliged to pay the amount of the check to the claimant if payment of the check has not been made to a person entitled to enforce the check. Subject to the provisions of subsection (a)(1) of K.S.A. 84-4-302 and amendments thereto, payment to the claimant discharges all liability of the obligated bank with respect to the check.
(c) If the obligated bank pays the amount of a check to a claimant under subsection (b)(4) and the check is presented for payment by a person having rights of a holder in due course, the claimant is obliged to (i) refund the payment to the obligated bank if the check is paid, or (ii) pay the amount of the check to the person having rights of a holder in due course if the check is dishonored.
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The opinions expressed are mine and they are not to be taken as legal advice.