Remittances - how can this section be cleared up?

SOLVED

We've only recently begun using this section, but there's an option to print remittances from YEARS ago!

I want to clear these from the list so it's tidier and also doesnt take a few minutes to run every time as it's searching all records.

I don't know the difference between purge/ delete.

Can anyone please help clarify what to do and what impacts either action could have?

Many thanks!