Wis. Stat. § 991.07
In any case when a limitation or period of time prescribed in any act which is hereby repealed for the acquiring of any right or the barring of any remedy or for any other purpose shall have begun to run and a limitation or period of time for such purpose shall be prescribed in these revised statutes, the limitation or period prescribed by these statutes shall be held to apply only to such rights or remedies as shall accrue subsequently to the time when the same shall take effect; and the act repealed shall be held to continue in force and operative to determine all such limitations and periods of time, which shall have previously begun to run, unless in special cases in these revised statutes a different rule shall be prescribed.
Wis. Stat. § 991.07
Generally, legislation is presumptively prospective unless statutory language reveals an intent that the statute apply retroactively. Procedural or remedial, rather than substantive, statutes are generally given retroactive effect unless contracts would be impaired or vested rights disturbed. Statutes of limitations are substantive. Betthauser v. Medical Protective Co. 172 Wis. 2d 141, 493 N.W.2d 40 (1992). When a statute of limitations is replaced or amended, a cause of action that has accrued prior to the effective date of the new statute or amendment is governed by the prior statute, unless the legislature specifies otherwise. A cause of action that has not accrued prior to the effective date of the new statute or amendment is governed by the new language, unless otherwise specified. State v. Hamilton, 2002 WI App 89, 253 Wis. 2d 805, 644 N.W.2d 243, 01-1014.