Ah yes, silly me, thanks, that worked perfectly. I guess there is no included save game for starting at the new content, because the new content begins at the very start of the game so the developer wants people to start over.
I do wonder though, I used the code to unlock the reworked CG gallery. I'm sort of regretting it because I like using the locked gallery to see if I've covered all the story bits as I play. In theory I could go delete my game's save game data, but well, after searching the thread my conclusion seems to be no one knows where the save data is stored.
So, uh, follow up, anyone know where the save game folder is? locallow/uberpie seems to just be save game thumbnails and the save data itself is stored elsewhere, but I have no clue where (it's not in the game's folder as I deleted that and unzipped it fresh and it remembered.)
edit: answered my own question finally found it: Ah, this explains the save data system/location
https://f95zone.to/threads/taffy-tales-v0-82-4a-uberpie.9861/post-7106383
tl;dr too complicated don't ask.
edit2: deleting save data, easy, anything else? don't even try.