ODKAggregateAppEngineUpdater Error

I get the following error after installing ODK Aggregate v1.4.15 when it is supposed to launch the app engine Updater tool:
There has been an error.
Error running java -jar .\ODKAggregateAppEngineUpdater.jar:
Exception in thread "maain" java.lang.NoClassDefFoundError:
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName0(Unknown Source)
Caused by:java.lang.ClassNotFoundException:
at java.base/java.net.URLClassLoader.findClass(Unknown Source)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
...3 more

       The Application Will exit now.

Am running ODK Aggregate v1.4.15 on Windoes 10 Pro

Hi @Alan_Kracker! Welcome to the ODK community!

You have Java 9. Uninstall it and install Java 8. This issue will be fixed in the next release of Aggregate.

Also, when you get a chance, please introduce yourself here.

thanks. am really glad this finally worked

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