How to change the "default application" for a certain filetype

That's easy and exactly where it should be found :)
Right click on the file of the certain filetype, choose properties and it's the "open with" tab.


Great, but sometimes you have change the application but the
old Programm are starting. And what to do now ?


changing default helper application in ubuntu

  •  I recently had the same problem. The Firefox browser was opening the wrong default application for mpg files because I had changed the settings. It took me a while to figure out how to change it back.
  • I had to go to the following folder. It will be different on each computer.     /home/your_login_name/.mozilla/firefox/profile_number.default
  • Save a backup copy of file mimeTypes.rdf. 
  • Edit mimeTypes.rdf.
  • Find the file type that is giving you problems and change the helper application that handles it.
  • Then save mimeTypes.rdf and restart Firefox.

can't change default app, what to do ?

it has been posted by micheal on other forum to no avail"I cannot select the other checkboxes. seemed locked. Anyone has a clue how to solve this???Right click the file and use open with works fine.The file is also write enable for the user.Thanks in advance"???

If you meet when you change

  • If you meet when you change application but the old Programm are starting, you can read this:
  • It will helps,

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Thanks for all the help

Thanks for all the help guys. I had this same problem and have no idea how to fix it. Now it is working again. Thanks!!________________________<a href=>Software Download</a>