When clicking on jnlp file another jnlp file is being downloaded, so the file "unconfirmed 34343.crdownloads" is created and UVWC cannot be opened.
Version: 6.x and 7.x
Component: Dollar Universe
Sub-Component: UniViewer Web Console
Wrong association of the .jnlp file.
Open the jnlp file with "Open with..." and choose javaws.exe file.