Awesome. So does trying to open a ".png.tns" file open it with mViewer, or does it just open mViewer and you still have to navigate to the file you want to open?

Wow, this is just getting better and better.

The file name is passed in argv[1]. I just haven't had the time to update the documentation (anyway this update is useless as long nespire/gbc4nspire/mViewer/nPlayer aren't updated too).

apcalc DFon't forget TI-Planet too

Also I can't wait for being able to launch WAD files directly from the Nspire file list

Hmm, I guess it would even be possible for a program to auto-install its own file associations by accessing the config file, right? It would be cool if Ndless included a built-in function for that, to enforce the correct format and not allow duplicates and such.

I thought of this, but I'm not sure if it will be really intuitive for users to ask them to run at least one time the main program for the file extensions to work.

It's more intuitive than setting it up manually (though of course, that would also be possible).

Edit: Here's another idea which would make it simple to package file associations with program releases (no text editing required). For example, for .nes.tns, there could be a file called ndless_cfg_nes.tns which contains the name of the program to open. (Since that file doesn't actually have a .nes.tns extension, it won't be treated as a NES file itself, naturally)

Hmm, I also wonder how I'll handle file associations for gbc4nspire, which has 3 different versions with different program names (gbc4click, gbc4touch, gbc4cx)