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I been asking myself that same question, for Linux files that dont have extensions and contain text (mostly) and FlashFXP using notepad++ and the internal flashfxp association in Options/file associations and even similar with notepad++ itself.
I have tried adding various masks "*" as the extension but it
doesnt work cant use the period but of course files without extension dont have periods, if you ever find a way let me know.
Edit
I did find this
http://www.techtronic.us/blog/post/t...n-application/ and it looks rather excessive.
cheers.