I was curious if anyone out there knew how to change Peachtree accounting from a 13 month period (where 13th month is Dec 31-Dec31) to a 12 Month period (where each month is a period)

There is a way to convert Peachtree from 13 month period (in which December 31— December 31 is the 13th month) into a 12 month period (in which each month is a period) without building a new Company in the Peachtree software. I have everything backed up so I am up for risky procedures as well as long as it may work.