This is a serious problem. When Comodo warns you that an app (especially one with a freeware or shareware pedigree) is trying to change your browser settings, users do pay attention. Because in the past some vendors (eg divx player) have refused to behave honourably in this regard, pushing malware onto users systems which can be very difficult to remove. Piriform must sort this out with Comodo or there will be reputational damage for Piriform.