Whenever I try to import my .nprof files, the profiler fails to come up with any information. No errors, or other information is ever shown, the program just continues running, but does nothing. Here is a link to the .nprof file: https://dl.dropboxusercontent.com/u/49381359/JumpStars.nprof
In 4.11.2 source builds, it looks like this comes down with the git dependencies (setup.bat) and what is downloaded is from an older version of UE4.
Open \UnrealEngine\Engine\Source\Programs\NetworkProfiler\NetworkProfiler.sln in VS2015 and build the project. \UnrealEngine\Engine\Binaries\DotNET\NetworkProfiler.exe will be updated and should now work.