Unfortunately the author of the NPPcrypt extension does not answer my questions/suggestions. So I must put it in here:
In general I appreciate the Nppcrypt plugin.
However I prefer to have a inconspicuously file extension which does not show that the file is encrypted.
Is it possible to make the file extension user definable?
I want e.g. file extension like *.biny or *.exez instead of *.nppcrypt.
Is it possible to include a re-definition of the default Nppcrypt file extension in the next release?
I stumbled upon this one in a search, so I'm chiming in rather late -- the option now exists in "Preferences" to define the extension.