after updating today i'm facing this issue, everytime i copy and paste any frame, the program crash.
"Spine Launcher 3.5.21
Windows 7 Ultimate x86 6.1
Java 1.7.0_80 Esoteric Software
32-bit Server VM
Up to date: Spine 3.5.48
Spine 3.5.48 Professional
Licensed to: *****, *****
NVIDIA Corporation
GeForce GT 610/PCIe/SSE2
4.5.0 NVIDIA 376.19
Started.
Sorry, an unexpected error has occurred:
java.lang.IllegalArgumentException: index must be >= 0.
at kg.a(SourceFile:282)
at zR.a(SourceFile:208)
at zQ.a(SourceFile:48)
at Ak.a(SourceFile:224)
at Ak.a(SourceFile:408)
at com.esotericsoftware.spine.editor.Editor.b(SourceFile:677)
at com.esotericsoftware.spine.editor.Editor.h(SourceFile:669)
at Ih.q(SourceFile:1566)
at HV.a(SourceFile:280)
at gD.a(SourceFile:28)
at eN.a(SourceFile:182)
at eN.a(SourceFile:147)
at com.badlogic.gdx.scenes.scene2d.ui.Button.b(SourceFile:124)
at fp.a(SourceFile:92)
at gF.a(SourceFile:89)
at eT.a(SourceFile:58)
at eV.b(SourceFile:353)
at p.b(SourceFile:96)
at az.a(SourceFile:332)
at al.run(SourceFile:238)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:745)
at java.awt.EventQueue.access$300(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:706)
at java.awt.EventQueue$3.run(EventQueue.java:704)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:715)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)"