I have purchased the HD Apprentice version of Houdini, build # 10.0.519. When I start it, i get the License Administrator requestor. I click the paid license option and it displays the list of licenses on my machine. I retrieve the server and license keys from the website, manually install them, the admin panel then says everything is green-checked, but the paid-license option wont work, and I still wind up with what appears to be the free limited version. Does the HD Apprentice version call itself that in its own About panel? or does it remain Houdini Master NonCommercial? Would it help to send in the Diagnostic file?

I am running Mac OS 10.6.2 with ATI Radeon 512 Mb

In your situation the best thing is to send the diagnostic to support@sidefx

Usually, you can automatically install the license keys using File > Install Licenses, but since you installed them manually, the best way to determine the problem is to inspect the diagnostic info.

cheers,
Rafal