From the Bitdefender Forum:
Removing Blocked Apps From the Blocked Apps List and Then Whitelisting Them
1. To remove a blocked application click on Modules and then click on Protection Locate Ransomware Protection and click on Blocked Applications. Highlight the blocked app and remove it from the Blocked Applications list.
2. To whitelist that app just removed from the Blocked Applications list or any app go to Ransomware Protection and click on Trusted applications. Add the app you want to whitelist.
Removing A Folder From the Protected Folders List and Adding a Folder To the Protected Folders List
1. To remove a protected folder from the proteced folders list, click on Ransomware Protection locate the protected folder in the list, highlight it and click Remove.
2. To add a protected folder to the protected folders list click on Ransomware Protection, click Add, browse for the folder you want to add to the protected list and add it.
If you need to reinstall BeerSmith in order for Bitdefender to recognize it.
Make a backup of ...Documents/BeerSmith2.
Go to Help > Activation and copy your key.
Download and install BeerSmith from the BeerSmith website.
Follow any prompts to allow BeerSmith to be allowed.