Hello there, CSJULIAN. I see that you want to switch back to the old invoice layout. Allow me to provide up-to-date information about this matter. 

Beginning May 6, 2024, all users will be moving to a new interface that has a modern design. This layout will permanently replace the old one, and switching back isn't possible. However, rest assured that your previous information will remain accessible even after you migrate to the latest design.

You can read the frequently asked questions about invoices and estimates to learn more about this transition. 

Moreover, to maintain accurate and up-to-date financial records, record any payments received so your invoices will be marked as paid.

The resources provided above are bound to prove useful and enlightening. It will also enable you to stay up-to-date with the latest features. If you need additional assistance, I'm always here to lend a hand.