I changed it like you said, but I figured out the problem. I'd been away from the game for a few years, and was still copying over the old Velious UI zip, because I thought I still had to. This was clashing with the files that were already there, and causing the buttons to be dark. I reinstalled the game and only used the new P99 UI files, which obviously have the Velious folder there. Thanks for your help.
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