Are you sure you installed the MP in the location of NX 11.0.1?
Are you sure the MP script completed without any "file not copied" messages?
2 things to check:
1) Make sure NX is not running (Check you Task manager if ugraf.exe is still running, if so, close it)
2) When you run the update, right click the file, and select, Run as Adminstrator. Even though you might be a local admin, this does give you some extra rights, so the update is successfull.
And like said before, if the updates ends, check if all files are copied. There should be no error message.