Solved
Creo Express Viewer
I have tried to get a Creo Express Viewer - the website says I should get an email with download instructions after submitting info - but this email never arrived (not in junk email either)
Try the following link: https://www.ptc.com/en/products/creo/creo-view/extension-express/free-download
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.