Hiding/ Removing old transactions from transaction tab

Hi everyone! I have been loving Tiller but with a new year, I would like to hide all of last year’s transactions. Every time I load my accounts, they automatically pull back EVERYTHING in history. I would like a way to set that only transactions from x date load. Or at least, if I delete them, to make them stay gone.
Forgive me if this is a silly question… I searched the forums and although I’m decently tech-savvy, I only use Tiller to track our monthly budget (previous YNAB user) so I am finding this issue very frustrating.
Additionally, is there a way to change a transaction date and make it STAY changed? I moved a large bill from Dec 30 into the new year, but when I pull new transactions, the date just changed right back. :frowning:

Thank you!