Upon chatting with their Technical Support on this link:
http://www.bitdefender.com/support/chat-support.html
They do not at the moment support this or plan to in the future.
We got this answer:
Liviu A. (12:32:18) : Ax, I would like to inform you that you can not add any exceptions on Antivirus free edition.
Liviu A. (12:33:16) : The Bitdefender Antivirus free edition works as a basic scanner.
Even if there are false positives, they will not add a simple mechanism like this.
Ax (12:33:22) : Yes, but most other Free Editions from other companies
allow us to add exceptions
Ax (12:33:46) : Exclude folders, especially since your tool is marking
False Positives
Liviu A. (12:35:31) : I understand the situation, but Bitdefender
antivirus free does not have the option to exclude files and folders.
Ax (12:35:58) : And there is no plan to change this in future.
Ax (12:36:40) : ?
Liviu A. (12:37:17) : Not as I am aware.
Ax (12:37:14) : Thank you. That will be all.