file mod problem after upgrade

I upgraded to the most recent Dolphin and it seems my file mod is not working .  I can view the file name but when i click on it the PDF does not open.  How can I correct

Quote · 27 May 2013

During upgrade, some files are replaced with new ones. 

If you have custom modifications in these files, then your custom modification can be lost.

You need to reapply changes in overwritten files.

Rules → http://www.boonex.com/terms
Quote · 28 May 2013
 
 
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