What happens to custom fields after trial period is over

What happens to custom fields after trial period is over

Dear Zoho team,

We have customized few fields during the trial version of zoho crm and had integrated the website form with the Zoho.

I would like to know what will happen to the custom fields when the trial period is over. Also would like to know what will happen to the data that is stored in zoho with these custom fields. Do we have to reverse the process to reset the feilds.

Regards
Rahul