DVD Studio Pro and Soundtrack Pro always ask for Serial

I use FCP X and sometimes Logic Pro X but the latter doesn't have nearly the capabilities for dialog editing that Soundtrack Pro did. Now that I'm on Yosemite (have no idea is that the problem) I can only open Soundtrack Pro or DVD Studio Pro by re-entering the serial number. I've seen this before with OS updates, but now it asks for me to re-enter serial every time I try to open them. Even if they were open a few minutes ago and I haven't restarted. Any ideas?