Upgrade script problem

I tried the upgrade script to go from 13.12 to 14, and here’s the result. Should I just download the current version and make a CD to reinstall? I’m not very experienced at doing the important technical stuff, just a loyal Linux user. I did NOT reboot as instructed at the end, because of those lines that said it was removing things. I’d be happy for some “beginner-friendly” advice.

This will upgrade Netrunner 13.12 to 14.
Please make sure to have a working internet connection and a plugged in power cord on your laptop

Press any key to continue or CTRL+C to abort

Upgrade process starts…
cp: omitting directory ‘/etc/apt/sources.list.d/’
E: Type ‘http://packages.netrunner-os.com/’ is not known on line 1 in source list /etc/apt/sources.list.d/additional-repositories.list
E: The list of sources could not be read.
Reading package lists… Error!
E: Type ‘http://packages.netrunner-os.com/’ is not known on line 1 in source list /etc/apt/sources.list.d/additional-repositories.list
E: The list of sources could not be read.
E: The package lists or status file could not be parsed or opened.
Reading package lists… Done
Building dependency tree
Reading state information… Done
The following packages were automatically installed and are no longer required:
kde-workspace-randr libtommath0 openjdk-7-jre-lib python3-pyicu
Use ‘apt-get autoremove’ to remove them.
The following packages will be REMOVED:
netrunner-desktop netrunner-system
0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
After this operation, 322 kB disk space will be freed.
(Reading database … 203681 files and directories currently installed.)
Removing netrunner-desktop …
Removing netrunner-system …
Removing ‘diversion of /etc/pulse/default.pa to /etc/pulse/default.pa.orig by netrunner-system’
dpkg-divert: error: rename involves overwriting /etc/pulse/default.pa' with different file/etc/pulse/default.pa.orig’, not allowed
dpkg: error processing netrunner-system (–remove):
subprocess installed pre-removal script returned error exit status 2
No apport report written because MaxReports is reached already
Errors were encountered while processing:
netrunner-system
E: Sub-process /usr/bin/dpkg returned an error code (1)
E: Type ‘http://packages.netrunner-os.com/’ is not known on line 1 in source list /etc/apt/sources.list.d/additional-repositories.list
E: The list of sources could not be read.
Reading package lists… Done
Building dependency tree
Reading state information… Done
Calculating upgrade… Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Reading package lists… Done
Building dependency tree
Reading state information… Done
Calculating upgrade… Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Unable to locate package netrunner-desktop
Reading package lists… Done
Building dependency tree
Reading state information… Done
The following packages were automatically installed and are no longer required:
kde-workspace-randr libtommath0 openjdk-7-jre-lib python3-pyicu
Use ‘apt-get autoremove’ to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Version ‘6.12ubuntu5+netrunner6’ for ‘base-files’ was not found

Upgrade finished. Please reboot.
cyne@blackhorse:~$