With the release of NX 6, we've seen a problem where the license bundles cannot be seen in
Start -> All Programs -> UGS NX6.0 -> NX Licensing Tools -> License Options
The workaround to this problem is to edit the license file (ugs2.lic) and globally replace:
ugslmd 24.0
with
ugslmd 24.000
then restart the license server service and you should be able to see your license bundles.