AVG dissapearance in Xperia

I have an Xperia E4, which had AVG Pro for Xperia preinstalled. However, after some automatic updates, I found it missing. The updater seems to have uninstalled the antivirus, and if I try to install it again with Google Play it downloads correctly but when installing it stops and shows a messange stating that the update is not compatible. Is this a bug? An incompatibility whith some Android versions I didn't know of? The doings of a virus? How do I fix it?

David, Please click on the following link (http://avgclick.me/AVGtechnical) and fill out your details, select as Android then the name of AVG Program that you installed in your device and in description please completely explain about your issue and finally click on Email option. The AVG team will reply back to you via email with a resolution.
AVG Guru

David, Please click on the following link (http://avgclick.me/AVGtechnical) and fill out your details, select as Android then the name of AVG Program that you installed in your device and in description please completely explain about your issue and finally click on Email option. The AVG team will reply back to you via email with a resolution.
AVG Guru