Any help is appreciated. If you need more information, let me know.

From the terminal:

java -jar AppleCommander-macosx-1.6.0.jar
***WARNING: Display must be created on main thread due to Cocoa restrictions.
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.webcodepro.applecommander.ui.AppleCommander.launchSwtAppleCommander(AppleCommander.java:103)
at com.webcodepro.applecommander.ui.AppleCommander.main(AppleCommander.java:57)
Caused by: org.eclipse.swt.SWTException: Invalid thread access
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.widgets.Display.error(Unknown Source)
at org.eclipse.swt.widgets.Display.createDisplay(Unknown Source)
at org.eclipse.swt.widgets.Display.create(Unknown Source)
at org.eclipse.swt.graphics.Device.(Unknown Source)
at org.eclipse.swt.widgets.Display.(Unknown Source)
at org.eclipse.swt.widgets.Display.(Unknown Source)
at com.webcodepro.applecommander.ui.swt.SwtAppleCommander.launch(SwtAppleCommander.java:78)
... 6 more