DLP in NGFW policy mode

Hi, 

I know that switching to NGFW mode will put the firewall inspection in flow mode. Any idea if we can use DLP sensor in flow mode. As it's not visible in the GUI. I tried enabling the DLP default sensor in Flow mode but still not visible in the GUI. 

We just to want to set a policy of blocking .exe, .dll files being downloaded from the internet. 

Any guidance on the same would be great. 

Sebastan