XXdita Essentials contains the trojan horse sheur.avtg!
I've just downloaded and checked this file and got nothing wrong. It might be a false positive because of the installer.
AVG has been reporting a number of files infected with this recently but they are false reports. I have had files independently checked in other AV programs and none are showing in anything other than AVG. Grisoft will be aware of this and will update soon, I am sure.
I can confirm Barby's information about AVG reports, in addition it doesn't report the same files as affected during the next scanning ()what() ;D