ProGuard can be downloaded from ProGuard’s GitHub page. Download the most recent version and place its ProGuard Java library (proguard.jar and proguard-ant.jar for ProGuard version 7.1 or later, proguard.jar for older versions) in the build/proguard folder of the LuciadLightspeed release, next to the configuration files (+* The minimum supported version is ProGuard 6.2.2.