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Created: March 31st 2015
Last updated: May 1st 2020
Categories: Miscellaneous Desktop
Author: Marcus Fleuti

Notepad++ reports "Unknown exception" on start because of the NppFTP plugin

The problem

When you start Notepad++ you immediately receive the error

unknown exception

The solution

We found out that the plugin "NppFTP" sometimes messes up its own configuration. You can reset it like this:

  1. Go to the folder
    C:\Users\YOURUSERNAME\AppData\Roaming\Notepad++\plugins\config\NppFTP

    Or: WIN+R (run) and enter

    %appdata%\Notepad++\plugins\config\NppFTP
  2. Delete the folder cache
  3. Delete the file Certificates.xml
  4. Restart Notepad++
  5. It will recreate the necessary files when it needs them. You will not lose any data