To add File Types to NewzToolz, go onto the Setup menu and choose File Types.
NewzToolz’s NZB downloader needs a list of file extensions to identify files in the subjects of an NZB file so that it can download the files from Usenet.
If NewzToolz comes across a subject where it cannot find the filename, it will show it to you, ask you to spot the file extension, and then enter it on this window. This is not hard to do. For example, if an NZB file contains a subject line with a filename such as crazyfilename.xyz, NewzToolz will complain about it. After you spend a few seconds entering “xyz” as a file extension, you can then import the NZB file with no problem.