No offense committed, and no liability, penalty or forfeiture, either civil or criminal, incurred, previous to the time of the repeal or alteration of any act or part of any act, by the enactment of the Revised Statutes or by any act heretofore or hereafter enacted, shall be discharged, released or affected by the repeal or alteration of the statute under which such offense, liability, penalty or forfeiture was incurred, unless it is expressly declared in the act by which such repeal or alteration is effectuated, that an offense, liability, penalty or forfeiture already committed or incurred shall be thereby discharged, released or affected; and indictments, prosecutions and actions for such offenses, liabilities, penalties or forfeitures already committed or incurred shall be commenced or continued and be proceeded with in all respects as if the act or part of an act had not been repealed or altered, except that when the Revised Statutes, or other act by which such repeal or alteration is effectuated, shall relate to mere matters of practice or mode of procedure, the proceedings had thereafter on the indictment or in the prosecution for such offenses, liabilities, penalties or forfeitures shall be in such respects, as far as is practicable, in accordance with the provisions of the Revised Statutes or such subsequent act.