I want to clarify that I have not used a Nfusion, and I do not know how good this information is. However it was posted at a reputable site.
"C/P from satfix.net *If you never used your receiver for private share and you have not touched your receiver since Nf went down in Dec all you need to do is
1.Verify what firmware is currently loaded if you see the file 153.1 which was the last release before it went down you can proceed with loading 154.2.
After you load 154.2 then do a factory reset because unless you load a factory file your settings are not defaulted therefore you need to do a factory default then rescan and reapply your configurations. Dn has made alot of changes to their channel line up and tp's."
If you are not sure what you are doing wait till somebody more knowledgeable answers.