RSFirewall reports com-docman files as a malware script

Hi guys, I run RSfirewall on our Joomla 3.70 install and it reports the following message when scanning files:

'administrator/components/com_docman/resources/install/.api.key
The file has been modified 1 week ago. Suspicious filename found. Files with a dot in front of them are usually hidden by the operating system. .api.key'

I upgraded to the latest version of Docman 1 week ago. Can you advise that this is a legitimate Docman file and should exsit?

Thank You

Andy