Thanks for follow-ups. Here's a summary:
I reported it simultaneously to VideoRedo Support. But their reply
doesn't
really move me forward:
"Perhaps it's a false positive. Check for an update to the virus
database.
Since the file is rather old, are you certain you downloaded it from
our
website?"
(I wasn't sure earlier, but it's now clear that it was a download from
the
Avira site.)
I also posted in the Antivir forum and submitted it to Antivir's own
detection service. The result was:
"The file 'VideoReDoPlus-2-1-1-413.exe' has been determined to be
'MALWARE'.
Our analysts named the threat DR/Genome.kht. The term "DR/" denotes a
program
that is able to place a virus or a malware discretely on a system."
I also submitted it to these two online services:
Jotti's malware scan gave these results:
http://virusscan.jotti.org/en-gb/scanresult/b5da81593cf9b0e3d1269 ...
07f83ed302
This appears to use bang up to date detection files and confirm that
Avira is
one of 7 (out of 20) that reports this file as having the trojan.
VirusTotal gave these results:
http://www.virustotal.com/analisis/...dca800c704495e9fc4cff5999d6cb3cfa7-1239602812
This has 'Last Update' dates from April of 2009! But it shows that 7
of 39
results detect the trojan.
I was puzzled why Avira was not one of those 7. But I now see I should
have
resubmitted to get an updated result. I expect that would show a
malware
detection against Avira Antivir.
Anyway, the file and its backup are now back in quarantine. As it's an
old
version of VideoRedo, I never need to access it. It seems pretty clear
to me
that it's a false positive. Apart from the fact that the original has
been
sitting in my Downloads folder for months or years, I reckon I must
have
executed the file at some early stage to install or update the
application.
But I'm still curious why only 7 out of 39 programs report it as
malware. And
puzzled why Antivir got it right last September but now reports it as
malware. I've asked about that in the Antivir forum.