Slow opening file

Hello, I’m from Brazil!
Avast is causing slow when I open a file.
I have already sent a ticket to false positive already have 5 days and had no response.
I wonder what can I do?
Note: When avast is off the file usually opens without slowing down.
(Google translator)

Portuguese:
Olá, sou do Brasil!
O Avast está causando lentidão quando vou abrir um arquivo.
Já enviei um ticket como falso postivo já tem 5 dias e não tive nenhuma resposta.
Gostaria de saber o que posso fazer?
Obs: Quando o avast está desativado o arquivo abre normalmente sem lentidão.
(Google tradutor)

Slow opening file
I have already sent a ticket to false positive already have 5 days and had no response.
slow opening of a file is not a False Positive ....

False Positive = https://www.virusbtn.com/resources/glossary/false_positive.xml

What is it then?
And what do I solve this problem?

i guess you dont have multiple Antivirus programs installed?

try lastest avast version https://forum.avast.com/index.php?topic=166883.0

Only Avast, gives last time this happened I sent ticket as false positive and after updating the file was working properly.