Where are all my app serial numbers stored?

I was having difficulty with one or two applications not working correctly so I've just created a new (admin) account on my Mac Pro (10.7.3). The apps in question now work fine in the new user account.

Problem is, of course, when I (later) used Migration Assistant to bring in all my old settings, it also brought in whatever the conflict was. So I would like to set things up one step at a time by dragging info from my old account to the new.

I've got all my Documents, Application Support and Cache files, but the Applications which require a serial number are still not working.

Can anyone please tell me where these serial numbers would be stored?

Thanks.

Andy