To this moment N++ supports two locations for loading/storing its configuration:

• the folder where N++ is placed in the system and
• a user home path

I suggest to implement a new feature that allows to customize the configuration location via command line. It could be similar to the --user-dir or --user-data-dir options or something else similar them supported by other applications allowing to store their configuration in another user-defined folder.

Pros:

• better portability (besides PortableApps that is not convenient)
• easy way to migrate to a new version for those who like to update applications manually