After installing fresh Ubuntu (13.04) pem (SSL certificates) are associated with "View file" (right-click on the file in Nautilus, I see "Open with View file"), which shows a clear text version of the certificate well.
Now I wanted to edit the file and therefore select "Open with another application" and select gedit. This worked, but now I see only "Open with gedit" and cannot return to the "View File" program (or add it as another option). I also noticed that many applications (for example, Sublime, which are available in Unity Lense) are missing from the dialog where I can choose which application to use to open the file.
How can I get more (everything that is known for unity, for example, lenses) shown in a dialog box where I can associate a file type with an application? Where can I find the file view application?
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