Where is the virus chest hidden in the current version?

Avast Free Antivirus / Premium Security
1

Yet again, Avast has pounced upon and devoured the COMPLETELY HARMLESS Media 100 Transcoder. I have reported this as a false positive several times but they will not fix Avast to stop it from doing that.

The Media 100 Transcoder is a playback decoder so video players and editors on Windows can play and edit videos created with the Media 100 or iFinish video editing systems.

2

It is hidden in plain sight - right click on the avast tray icon, select virus chest.

Whilst you are in there, you can select Restore and add to exclusions (accepting the risk if not an FP).

At the same time you can submit the file again to the virus labs from the chest.