files for MDK-ARM are frequent targets for malware, and using them can lead to licensing conflicts or corrupted project files that are impossible to debug. For those without a commercial license, the Keil MDK-Community Edition
It is one of the last versions to seamlessly bridge the transition between Arm Compiler 5 (classic) and Arm Compiler 6 mdkarm version 525 download link
Here are some general steps and considerations: files for MDK-ARM are frequent targets for malware,
Some users reported that later versions (like v5.26) introduced "Source Browser" or navigation bugs, leading them to revert to the relative stability of v5.25. Avoiding the "Deep Web" Trap mdkarm version 525 download link