Just bought the full version. restarted App, went to download pdfs from my OneDrive but they're all greyed out?

Most common reason is that they are not downloaded to your iPad yet. Download them in the OneDrive app and then import them into Stage Traxx.

    peter so being ‘offline files’ in OneDrive on the iPad isn’t good enough? I need help with this it’s very frustrating. I bought this as it was so well recommended.

    I’ve just spotted tutorials! I think I need to attach sound file first. I have been using ForScore which is very different.

    Oh, ok. You did not say you tried to open the pdf directly in the add song dialog.