Trojan in Avast

Customer of ours is using Avast 4.0 which we reinstalled after determining the new Version is not compatible with Milennium. Avast popped up saying a trojan was found in it’s own files; is this possible? The file was:

C:\program files\alwil software\avast4\setup\vps-11022600.vpu

That file belongs to the virus definitions. It’s a false positive. Strangely detected by avast itself.

Another question then; she said in the pop up that reports the trojan there is no option to ignore. Is there something in the settings itself you can list objects to ignore?

False positive is trigged just on file ‘vps-11022600.vpu’, next VPU file ‘vps-11022601.vpu’ is OK.