Moved: Can't install Firecore apps after doing a "Reset all Settings"

Sorry, I'd put this in the wrong section so have moved it!

I had problems joining my ATV2 to to a new router and the apple forum suggstion was to do a "Reset All Settings" from the Settings>General>Reset Menu. Whilst this worked and my ATV is back on the new network I have another problem. After the reset I had to enter all my credentials but was releived to see Plex and the Media applications were still present and worked. However, I wanted to replace the old Media App with Infuse. When I went to Maintenance>Manage Extras, all the applications show as "not installed". When I tried to install Ifuse, it failed and the error log said the following:

Installation Failed

E: Could not open lock file /var/lib/dpkg/lock - open (2:No such file or directory)

E: Unable to lock the administration directory (/var/lib/dpkg), are you root?

E: Could not open lock file /val/lib/dpkg/lock - open (2: No such file or directory)

E: Unable to lock the administration directory (/var/lib/dpkg), are you root?

I am running 4.4.4 with an untethered jailbreak.

Any suggestions? Will I have do another jailbreak and can I still install 4.4.4?

 

Thanks