Ferramentas de linha de comando do Amazon Mechanical Turk - Ocorreu um erro JNI [fechado]

Estou tentando instalar e usar as ferramentas de linha de comando do Amazon Mechanical Turk, que acabei de baixar em https://requester.mturk.com/developer/tools/clt

Estou tentando executá-los em um prompt de comando do administrador no Windows 10.

Quando tento o script getBalance, recebo o seguinte erro:

c:\mypath\aws-mturk-clt\aws-mturk-clt-1.3.4>bin\getBalance
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: com/amazonaws/mturk/filter/Filter
        at java.lang.Class.getDeclaredMethods0(Native Method)
        at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
        at java.lang.Class.privateGetMethodRecursive(Unknown Source)
        at java.lang.Class.getMethod0(Unknown Source)
        at java.lang.Class.getMethod(Unknown Source)
        at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.amazonaws.mturk.filter.Filter
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 7 more

A mensagem de erro diz para verificar minha instalação, mas não havia realmente nada para instalar.