Created attachment 76925 [details] example of the registry file LO-4 filters allow the user to open PUB, CDR, and PDF files using ‘LibreDraw-4’ program. ‘LibreDraw-4’ saves these files as ODG format files after this action. Now these files open only when ‘LibreOffice-4’ starts, because they are not registered in the Windows registry when ‘LibreOffice-4’ was installed. Simple registration in HKEY_CLASSES_ROOT allows: 1. Opens these files by ‘LibreOffice_4.x.x’ directly from Windows Explorer by clicking on the mouse. 2. Selects ‘LibreDraw’ as the program that opens a particular file and (or) will open all files of this type by default. Such registration is made (even for 3.7.0) in my Windows XP (32\64-bit) and had proven its efficiency. You can see the example of this registry file in an attachment (BRAND_BASE_DIR=C:\Other Programs\LibreOffice 4.0).
For me, PUB files have been registered automatically to LibO. As for CDR, it seems Uniconvertor has stolen the association and it would otherwise be LibO's. I'm quite sure we can't let LibO have PDF by default.