Are you using AVG? Because I had an email from someone today reporting exactly the same thing. There are variants of the SHeur trojan listed in the
TrendMicro database, but not this particular one.
The only thing I can think of is that this file (1,003 KB) was built with some free packaging software I found while my main PC was away being mended. The current version, built with my usual packager (WinZip SE) is 429 KB, so that freebie carries a lot of baggage in any case - perhaps AVG found a signature somewhere.
Thanks for the report - please delete that file. I'm no virus expert, but it shouldn't have done any damage... It's significant that these two reports have come at the same time long after the file was made available, and no problem was flagged at the time.