By alert I'm talking about the reason it was sent to the virus chest, e.g. what did avast say in the virus alert ?
If it is still in the virus chest you could try the Send for Analysis if you think it is a false positive detection. That I believe would be the only reason why you would consider trying to sending it back to the original location (e.g. Restore).
That said I believe there are some issues with the options in the Virus Chest.
I tried to send a file for analysis, but I kept getting an error 'Something went wrong.' In the forums I got a suggestion from an avast team member that it was probably because it is no longer detected.
But when I tried to restore I got another error 'Whoops, error occurred. This file can't be restored'. That file location was a sub folder of Windows\Temp. Even trying to delete it from the virus chest doesn't work, even after confirmation I want to delete, it remains in the chest.
So all in all I believe the virus chest is currently stuffed, sorry for using technical terms.
I think that we need some Avast Team input on this.