Are you on a Mac or PC? If you are on a PC, do you have QuickTime installed?
Did you try importing that file? I haven't used ProRes 4444, but I have used ProRes 422 frequently (on a PC, as well) and that works fine. As long as you have QuickTime Player installed, ProRes should import--generally speaking. The 4444 variant might not be supported, but it's worth a shot.
As Colin suggests, if the ProRes 4444 codec is installed on the machine, you should be able to import it fine. I do this in After Effects a lot, though I haven't yet done it in Premiere Pro.
I'm finding being on a MAC with FCP and Prem Pro works a treat.
I have migrated from FCP to PP with cuda (alot faster) and as long as you have FCP on board all
the ProRes formats exist and work really well in PP.