When double clickking on a file (filename.ods)
to open it in Calc (4.4.5)
it shows a popup 'How do you want to open this file?'
see: http://postimg.org/image/t6uuzx625/
I tried to choose the correct executable (C:\Program Files
(x86)\LibreOffice 4\program\scalc.exe), but this fails also
Opening calc, and than opening the file from LO works OK.