If you cannot find a valid download for your very old model (e.g., HP t5740), consider these alternatives that offer similar "Control Center" functionality:
The is a built-in management interface for HP thin clients running the ThinPro operating system. It is not a standalone app you download to a PC, but rather a core component of the HP ThinPro OS image . 🚀 How to Access Control Center Hp Thinpro Control Center Download
If you are already on ThinPro but the Control Center icon does nothing: If you cannot find a valid download for
If you are looking for a way to manage multiple thin clients from a central server, use these official HP tools: HP Thin Client Software | HP® Official Site Hp Thinpro Control Center Download