Sure. I cleaned everything, deleted the .weasis folder and the Temp files from Java on the Control Panel first.
I am launching from the Weasis demo:
Java Web Start 11.60.2.27
Usando versión de JRE 1.8.0_60-b27 Java HotSpot(TM) Client VM
Directorio de inicio del usuario = C:\Users\ANALISTA
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c: borrar ventana de consola
f: finalizar objetos en la cola de finalización
g: recopilación de basura
h: mostrar este mensaje de ayuda
m: imprimir uso de memoria
o: disparar registro
p: recargar configuración de proxy
q: ocultar consola
r: recargar configuración de política
s: volcar propiedades del sistema y de despliegue
t: volcar lista de threads
v: volcar pila de threads
0-5: definir nivel de rastreo en <n>
----------------------------------------------------
server running at port: 51970
server running at port: 51970
***** Starting Configuration *****
Operating system: windows-x86
Preferences directory: C:\Users\ANALISTA\.weasis\preferences\ANALISTA\default
locale.lang.code: en
locale.format.code: system
org.apache.sling.commons.log.level: INFO
org.apache.sling.commons.log.file.activate: false
org.apache.sling.commons.log.file.number: 5
org.apache.sling.commons.log.file.size: 10MB
org.apache.sling.commons.log.pattern: {0,date,dd.MM.yyyy HH:mm:ss.SSS} *{4}* [{2}]() {3} {5}
weasis.look: org.pushingpixels.substance.api.skin.SubstanceTwilightLookAndFeel
Last running version: 2.0.4
Current version: 2.0.4
weasis.resources.path: C:\Users\ANALISTA\.weasis\data\9158522D\resources
Clean plug-in cache because Weasis has crashed during the previous launch
***** End of Configuration *****
Weasis Starting...
========================
08.09.2015 01:48:48.073 *INFO* [FelixStartLevel]() org.apache.sling.commons.log.internal.LogManager LogManager: Logging set up from context
ERROR: Bundle jai-lib [10] Error starting
http://osirix.vital-it.ch:8089/weasis/bundle/jai-lib-1.1.4-b05.jar (org.osgi.framework.BundleException: Unresolved constraint in bundle jai-lib-windows-x86 [1]: No matching native libraries found.)