It's official, I'm retarded.
I forgot to save my game before I quit and lost everything.
Would anybody be willing to post one up for me? I quit out at the point just after you practiced with Dee Dee.
If you haven't done it already, you can download the "walkthrough and saves" in the OP. Install the saves and then you can load a developer provided save from "autosaves" in the Willy D start screen. These are based on past game updates so you'll want to find one from before the "version" you're in.
You can find what version you're in by looking at the walkthrough to see where you are. So, for example if you see that the part of the walkthrough you're in is for Version 0.0.4 then you'll want to load the autosave for v0.0.3.
Unfortunately there isn't a save for every released version of the game, so you might have to replay a fair chunk of the game if the closest previous autosave is a few versions older than where you are.
Good luck, and it's a great game, so worth it to replay some stuff if you have to.
Also, if you want to skip through dialog quickly to catch up to where you are, an auto clicker works well.