Forum Discussion
Storing Desktop Report Files in SharePoint?
Is anyone storing reports in SharePoint and have them associated with the Desktop Client correctly?
Don't know if you still facing this issue. Behind the following link it explains how you can link unknown file types in SharePoint en opens them by a click.
https://kerseub.wordpress.com/2012/04/23/add-new-file-type-in-sharepoint/
good luck!