Mp3 icons

I have just had to re-install my soundcard software (Creative SB Audigy 2 ZS) and now Opus will not display the correct icon for .mp3 files. They display correctly in Windows Explorer and the Opus 'File Types' dialogue shows the correct icon (Creative MediaSource) but I have anyway tried re-setting it from scratch. The lister window nevertheless displays a different icon that I take to be a default. The file association is clearly OK as a double click on an .mp3 file in the lister brings up the MediaSource player and plays the track OK.

Other files eg .mov files display the correct (Quicktime) icon.

Can anyone explain how I correct this for .mp3 files?

Have you waited a few minutes after changing the icon, or restarted Opus? I think Opus only checks for new icons every so often.