Unable to whitelist by FTP

Hello,
I distribute the setup file (done with InnoSetup) of my program. The setup is digitally signed.
When I run it on a computer, Avast AV tries to analyze it and I suppose the program is run in a sandbox. Error Boxes are displayed (like here https://stackoverflow.com/questions/35130522/shellexecuteex-error-299-when-launching-installer-created-with-inno-setup).
Each step of the setup is run 2 or 3 times with 15s analysis process between each.
My customers are very annoyed because of it and it does not sound very professional.

In order to avoid those issues, I would like to whitelist my program. I assumed this would get around these issues.
I followed each step here: https://support.avast.com/en-us/article/Threat-Lab-file-whitelist.
But the file is around 100MB so it doesn’t fit the limit allowed here:https://www.avast.com/en-us/whitelist-program-registration
However, it is impossible to obtain credentials to go through the FTP option.

Thank you for your advice and help.

Hi, you first need to join the Whitelisting Program (https://www.avast.com/en-us/whitelist-program-registration). Then, wait to receive the FTP credentials to Avast’s FTP server. They will be sent to you after your request for joining the Whitelisting Program will be reviewed.

Hello,
I already did that, and I received the credentials today.
It is not very practical to have to send a dummy file to register and then receive the credentials.

Will whitelisting my program prevents Avast AV from performing these scan steps that cause installation to fail?
Thank you

If it gets approved, yes.