How reset to 0 the numbers of visitors after the period

Hi everybody,

I use this plugin since 1 year and the time is past, now the plugin has to reset for new period but the number of visitors stay the same,

I need to have someone who may help me to reset 0 the number of visitor, for a period of 365 days,

If you have the solution tell me what to do,

See you soon,

Thank you.