Right click on a file icon (e.g. with the file extension .jpg). Select "Open with" and click on "Select program". The following screen will appear:
Here, you can assign a file type to a program which you want to use to open files of that type. If you want this file type to always be opened using the selected program, use the mouse to enter a check mark in "Always use this program to open these files".
If the following screen appears when you open a file, select the option "Select program from list" and confirm with "OK".
The first screen shown then appears. You may then proceed as described above.
Caution! Only file types supported by the selected program may be opened. Consult the appropriate program documentation for details of the file formats supported.
If you still cannot open the document, you must install a program that can process that file format.
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