I have seen some of our clients hadn’t downloaded the newer client version to path c:\ProgramData\Netskope\stagent\download\

Normally a restart of the device or the NS Service triggers the download. 

Also, check the AD group used for targeting the Client Configuration, confirm the user is a member of same group too. 

There was a bug, which prevents client from updates when “protect client configuration and resources” is turned on. I believe fixed in 119:
 

119.0.0

| 487939 | Fixed | an issue where the Netskope Client cannot auto upgrade when self-protection and per user mode are both enabled. |