public void clearCache() {
        if (tmpFolder == null) {
            return; //low permissions
        }
        for (File file : tmpFolder.listFiles()) {
            if (file.isFile() && file.getName().endsWith(FILE_EXTENSION)) {
                file.delete();
            }
        }
    }
Clears the cache.
All saved program binaries are deleted.
jme3-core/src/main/java/com/jme3/opencl/ProgramCache.java