This is probably going to be the most simple thing ever but..

Right at the start, chose the nerd (since he was the only one available), I get some dream sequence with someone called monica running and annoying music in the background. It says "Yes the zipper is unzipping!" or something then nothing. She has been running like that for over an hour. I cant seem to interact with anything either.

I finished the other 2 stories no problems but this one I can't even seem to get going.

That doesn't normally happen. Restart the game and try again.

Tried that, Tried Rebooting, Tried Uninstalling and Re-downloading the game. It's exactly the same every time
Can I edit the save file to skip past the start maybe?

Install and play v3.5

Nb
Had the same issue with version 3.0

you can download 3.5 complete save game from account manager, and skip this scene. but you will probably be a bit later in the game and miss some intro things.

normally, monica's dress zipper should open, and the dream end when it's completely open (or near completely open maybe)

Thanks Scruffy and laissemoirire - I was indeed on the wrong Version. Derp. Thanks - I got a creature to grow