Rogue tools can silently exfiltrate proprietary source code during the compilation process. Step-by-Step: Verified Download Process
If you have a valid Keil MDK license, you can log into the Keil download center, input your License Code (PSN), and download older MDK versions (such as MDK v5.36 or earlier) that include Arm Compiler 5.06 Update 7 bundled out of the box. arm compiler 506 update 7 verified download
Filter the product catalog or archive list for "Arm Compiler 5". Select version 5.06 and locate Update 7 (often listed as build 960 or similar specific build numbers depending on the OS platform). Rogue tools can silently exfiltrate proprietary source code
After downloading from an official source: Select version 5
5.06u7 requires a valid license. It will not run in "community" or "free" mode unless used within a licensed Keil MDK environment.