We are using HP t630 thin clients with thin pro OS , how do we upgrade the Horizon Client Application on the thin clients to the latest version as we plan to upgrade to Horizon 7.6 soon
The horizon client should be packaged in the ThinPro upgrade.
Here is a compatibility sheet that will tell you which client supports the latest Horizon environment.
https://www.vmware.com/resources/compatibility/pdf/vi_view_guide.pdf