your mixing up attributes... the htaccess file is a server issue... not an issue of Digital File Pro 2 or 1 for that matter. Digital File pro can handle any image size... but YOUR HOST for example may only allow 8MB uploads for example, if that's the case and you try to upload a file bigger than that, it won't work but not because of Digital File Pro 2, but rather because that is the parameter for limitation by your host.
Some people who control their own server decide to use htaccess files to set php parameters. I prefer just to use the php.ini file when possible. But, the earlier post of htaccess was because whoever was trying to upload a large file had previously had an htaccess file that was limiting the size of uploads - not DFP2.