The program needs to download the Par files. so it can repair the damaged files if needed. As of right now it is not doing this .

more than likely you are not getting an update thru that fixes this problem. there have been multiple reports of this.

there is no more beta, the release went out a couple of days ago.

uninstall mcm then download the current version 1.33 and install. make sure to go back thru your settings because there were changes.

I'm getting PAR files just fine... in fact, there hasn't been a Usenet build (even in beta) that skips them. So regardless of which version you have, it should be downloading all the files in the NZB (have you inspected the NZB to make sure it includes parity files?).