To prevent this from happening initially we'd always recommend duplicating any line items or proposal templates you want to make changes to.
If you didn't get a chance to do that this time, no worries.. this is how you can recover them.
To restore line items you have made changes to back to their defaults you can re-import them.
This won't replace the line items you already have in your system, but will add the originals back towards the bottom of your line items page within their own "IMPORTED" section.
Learn how to do this here.
Proposal/Engagement Letter Templates
To restore original proposal or engagement letter templates, drop us a message in the chat or e-mail email@example.com and we can add these back in for you.
Remember, you can duplicate any line items or proposal templates you want to work on so you can always keep the originals for comparison.