Registry entry for file lock not working

I have made a new registry entry to be prompted to lock a file when opening in Box Drive. Per this support page:

https://support.box.com/hc/en-us/articles/ [removed by moderator] -Enabling-Enhanced-Lock-Unlock-on-Box-Drive-Windows-Only

The behavior is not working. Re-boot makes no difference. Does one need to be a Box Admin for this function to work? I tried a separate registry entry for default Box folder and that does not work either. I am the administrator on my Windows machine, so it is nothing to do with that I do not think.

Any suggestions?