I also downloaded it from the same site that you have provided...I asked this because when I run this in eclipse I get this in the console...
***** Starting Configuration *****
Operating system: linux-x86
Installation directory: /home/sreejith/.weasis
weasis.language: en
weasis.country: US
weasis.variant:
weasis.confirm.closing: true
weasis.export.dicom: true
org.apache.sling.commons.log.level: DEBUG
org.apache.sling.commons.log.file:
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.SubstanceMistAquaLookAndFeel
Last running version: 1.2.6-beta
Current version: 1.2.6-beta
***** End of Configuration *****
you can see that It shows 1.2.6-beta.....Please verify...