Bumping to say I'm having this exact problem on 2 different Win7 PCs that I've tried running spine essential on. Happens if I run as admin or normal user... I noticed that my C:\Users\bburbank\AppData\Local\Temp\libgdxbburbank folder was read-only, but even after giving all users full rights to the folder (and DLL inside) I get the null pointer 🙁
Spine Launcher 1.8.18-full
Windows 7 x86 6.1
Java 1.7.0-u6-unofficial Oracle Corporation
OpenJDK Server VM
An unexpected error has occurred:
java.lang.NullPointerException
at a.E.a(SourceFile:84)
at com.esotericsoftware.spine.editor.launcher.Launcher.a(SourceFile:345)
at com.esotericsoftware.spine.editor.launcher.Launcher.b(SourceFile:432)
at com.esotericsoftware.spine.editor.launcher.Launcher.d(SourceFile:530)
at com.esotericsoftware.spine.editor.launcher.Launcher.<init>(SourceFile:265)
at a.k.run(SourceFile:1107)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:711)
at java.awt.EventQueue.access$000(EventQueue.java:104)
at java.awt.EventQueue$3.run(EventQueue.java:672)
at java.awt.EventQueue$3.run(EventQueue.java:670)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:681)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)