The CTAN latexdiff page states that latexdiff is contained within miktex. Trying to install it using MiKTeX Package Manager (Admin) as suggested January 14th, I instead encounter an error (is it a connection error?):
MiKTeX Problem Report
Message: The remote package repository is not registered. You have to choose another repository.
Data: url="http://ctan.org/tex-archive/systems/win32/miktex/tm/packages/"
Source: Libraries\MiKTeX\PackageManager\PackageManager.cpp
Line: 1817
MiKTeX: 2.9
OS: Windows 10 Pro, 64-bit, build 14393
Invokers: non-existing/explorer
SystemAdmin: yes
PowerUser: no
Root0: C:\Users[account]\AppData\Roaming\MiKTeX\2.9
Root1: C:\Users[account]\AppData\Local\MiKTeX\2.9
Root2: C:\ProgramData\MiKTeX\2.9
Root3: C:\local tex files
Root4: C:\Program Files\MiKTeX 2.9
UserInstall: C:\Users[account]\AppData\Roaming\MiKTeX\2.9
UserConfig: C:\Users[account]\AppData\Roaming\MiKTeX\2.9
UserData: C:\Users[account]\AppData\Local\MiKTeX\2.9
CommonInstall: C:\Program Files\MiKTeX 2.9
CommonConfig: C:\ProgramData\MiKTeX\2.9
CommonData: C:\ProgramData\MiKTeX\2.9
Apparently there is no other online repository I can choose from. Is my only option to install Perl and try Chelsea's Sept. 2016 solution independent of miktex?
