287.500.  Circuit court may act upon memorandum — procedure. — Any party in interest may file in the circuit court of the county in which the accident occurred, a certified copy of a memorandum of agreement approved by the division or by the commission or of an order or decision of the division or the commission, or of an award of the division or of the commission from which an application for review or from which an appeal has not been taken, whereupon said court shall render judgment in accordance therewith and notify the parties.  Such judgment shall have the same effect and all proceedings in relation thereto shall thereafter be the same as though said judgment were a final judgment which had been rendered in a suit duly heard and determined by said court.  Any such judgment of said circuit court unappealed from or affirmed on appeal or modified in obedience to the mandate of the appellate court, whenever modified on account of a changed condition under section 287.470, shall be modified to conform to any decision of the commission, ending, diminishing or increasing any weekly payment under the provisions of section 287.470 upon the presentation to it of a certified copy of such decision.