You should be able to just load the new (4/4) Style from the StylePicker. Check though that you don't have any changes made to the song through F5, there should be some form of an indicator if there is.

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BIAB & RB2024 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones