If you have his updater plugin, just run that. Leave the current ones there unless space is an issue.
The way that picons work is that the receiver looks for icons which match the service reference. There can be a few channels with the same name but different service reference. Regions etc, chanenl details chnaged. For the ones that are missing, they are not really missing, they just have a different name. You have to find it and rename them or create symbolic links.