***sorry I am not a good English speaker ***
I have a trust program and avast detect it when I run it
I know this program and I trust it
and I want that avast stop to block it
what can I do
thanks to help me
gspfranc
You can send it to virus (at) avast (dot) com and put in the subject of the message False Possitive. Also zip the file and put virus as the password ,then send the email.
Good luck 
French:
Tu peux l’envoyer a virus (arobase ) avast (point) com et comme sujet de l’email False Possitive. Apres met une copie du fichier en question dans un ZIP et ajoute comme mot de passe “virus”, apres tu peux l’envoyer a Avast et si c’est vraiment une erreur il enleveront la detection.
Bonne chance
Welcome to the Forum
Bienvenue dans le Forum
Al968
You could also check the offending/suspect file at: VirusTotal - Multi engine on-line virus scanner
Or Jotti - Multi engine on-line virus scanner if any other scanners here detect them it is less likely to be a false positive. You can’t do this with the file in the chest, you will need to move it out.
If it is indeed a false positive, add it to the exclusions lists (Standard Shield, Customize, Advanced and Program Settings, Exclusions) and periodically check it (scan it in the chest), there should still be a copy in the chest even though you restored it to the original location. When it is no longer detected then you can also remove it from the Standard Shield and Program Settings, exclusions.
Also see (Mini Sticky) False Positives, how to report and what to do to exclude them until the problem is corrected.