I just checked, and I forgot to add the functionality with the new models!
Thank you for letting me know. There's no issues on your side, it was my mistake. I'll get it fixed and push out an update when I can. Unfortunately, Itch has been a pain and keeps "quarantining" my page. I'm afraid to publish a build until I hear back from them, in fear of postponing their response further. This is the second time it's happened, and they're not communicating why it's happening.
If you do really want to try inflation before I get an update out, the previous build does have functional inflation, if you want to compromise with the old models.