To download FortiClient version 6.0.10 , you should primarily use the official Fortinet Support Portal

| FortiGate Version | Recommended FortiClient Version | Download Availability | |-------------------|--------------------------------|------------------------| | FortiOS 6.4.x | 6.4.9 (last of 6.4 branch) | Support Portal | | FortiOS 7.0.x | 7.0.12 | Support Portal | | FortiOS 7.2.x | 7.2.5 | Support Portal | | FortiOS 7.4+ | 7.4.1+ | Support Portal |

Here are the direct download links for FortiClient 6.10: