Sorry about BING's machine translation.
The program is associating PDF files with the icon of 1 SumatraPDF.exe (Icon Group: 1),
and DJVU files, EPUB, FB2 icon 2 from SumatraPDF.exe (Icon Group: 2).
How do I make manually via the registry, that would be ( for example, a DJVU file, was associated with icon 3 (Icon Group: 3)
This is only for personal purposes and for the convenient use.