Some time ago i had problem starting Netsight because of java problem. Console fails loading cache. There was not easy thing to find where the cache was stored. [clearing java cache via java control panel was not effective].
Finally i found all three locations and wrote batch script to clear NMS java cache:
rmdir c:%homepath%\AppData\LocalLow\Sun\Java\Deployment\cache
rmdir c:%homepath%\Application Data\NetSight
rmdir c:%homepath%\AppData\Roaming\NetSight