Well... the trouble is, figureing out if it is really false or not
Of course if it is a false positive then yes you can ignore it, but how do you know? Frequently with new virii or morphing ones, only a handfull or even one av scanner will even pick it up and it may be legit. On the other hand I've written code myself that managed to trip at virus scanner by accident in the past. There are now so many signatures and code is a fairly random set of bytes that it does just happen sometimes.
The only way to really get to the bottom of it is to contact the maker of the software and work it out with them... It's not unheard of for a companies build machine to get infected and then produce infected files for DL
Edit: Just a couple months ago I got a driver
disk for a 4x2 HDMI switch that MSE flagged as having a virus on in the driver on the CD! Company was not responsive and so I just didn't install it...