Hacking *.nds files are associated with the Evotools trimmer

[Nathan-NL]

I used Evotools quite a time (for the logo's and information), but now I made some mistake and *.nds files are now associated with the Evotools trimmer.
And I want it to show the ROM logo's and information. So how can I delete the association with the Evotools trimmer?

I tried to delete Evotools and reinstall it, but it didn't work out

 

[Chanser]

Load windows explorer or my computer, tools menu, folder options and click on file types.

 

[Arno]

Or control panel>default programs, then go through the settings there.

 

[Nathan-NL]

That's the problem, I can only change the program that's associated with the file type, but I can't delete it >_<

Edit: My OS is Windows Vista Home Premium