8.0.2 HP2 WebAccess agent on Windows 2008 Standard

I don't find the answer to this in the manual. What is the purpose of the \\[webaccess_server]\grpwise\gwsys\WebAccess\tmpFiles folder and what are the *.NTV files located there?

The .NTV files appear to be parts of Internet messages, some are clear text, some are either corrupt and scrambled, or encrypted. The size varies.

I also see a bunch of .JPG's in the same folder. These open in the image viewer just fine.

Can this folder be cleared, or is it some sort of working folder?