I recently installed P3D v6 and tried using the latest version of the Lorby Si Addon Manager.  After saving the modified scenery.cfg file I then tried making scenery library changes from within P3D v6 and got the message that P3D was not able to open the scenery,cfg file to write.  Checking the permissions on the scenery.cfg file I discovered that the Lorby Addon Manager had changed the permissions on the file removing write permissions.  Is there fix for this issue?

That is generally the users' choice.
File security settings are here: 

P4AO -> Settings -> "Security attributes of created files".

Thank you very much for your response.  That definitely fixed the issue I was having.  I definitely need to find the documentation for the organizer and do some reading.  What is the expression, "when all else fails read the directions".  Something I definitely need to follow.  Thank you again.