This Altair One Portal does not seem to comprehensive include some of the Altair related information from publicly accessible Altair website(s).
For example, the following website is visible to the public, and yet, I can't seem to locate the example files that is included there (because you hid them). So as a licensed customer, how do get access to some of these things? Thanks
https://2021.help.altair.com/2021/hwsolvers/os/topics/solvers/os/nlstat_analysis_arthritis_finger_os_tut_r.htm
OS-T: 1580 NLSTAT Analysis of Arthritic Finger
Select the arthritis_finger.fem file you saved to your working directory from the optistruct.zip file.