Somehow file associations .bat and .cmd (possibly .exe also) became associated with Notepad++ on Windows Server 2012. As a result, the "Run as Administrator" context menu option is NOT available for any files of these types. None of the options shown in the article at https://kb.abacusprivatecloud.com/articles/488-How-To-Change-Default-Programs-Applications worked. I tried associating .bat with cmd.exe, but the system simply sat "grindging away" for quite a while, then the panel came back, but no change was made in association.
How can I reset these file types back to their default associations?