[2021] Is there any way to go back to the old save file

Originally posted by Quinton Starbanger IV: Turn on creative mode, fix your house, roll back the in game day to whatever you wanted to go back to, turn it off, carry on playing.

This, But don't mess with time. That is a very quick way of ruining a save if you don't know exactly what you're doing; And sometimes even IF you know what you're doing. The game scales to your personal progression, so the actual day isn't particularly important except in regards to when the next blood moon is.