Hi Danny:
I am afraid you did delete more, I think you need to Format the T3 HD, BUT, before you do, make a backup of what you have in your HD, like Registrations, Styles, etc....
To do that, you need to connect via USB the Tyros with the PC, and before you turn on the T3, keep pressed the Music Data Finder while you turn on the T3, this will enable you to be in USB Mode.
Transfer all the data you want to save, and after that, disconnect the USB and re-star the T3, NOW, proceed to Format the HD, and when is done, go back to the USB mode, and this time just transfer the files/folders you want to have back in the T3.
I don't see other options.
As a habit that I have now, every month or so, I back up my T3, entire HD, I keep making small changes not to all, but "fine tune" some registrations, adjusting Volume parts, panning, FX, etc...
In case of an accident, I have a T3 HD backup.
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mdorantes
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mdorantes