Open from Explorer in Windows 10 not working

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.

of course i did a search for 'remove malware'....

https://www.microsoft.com/en-us/download/malicious-software-removal-tool-details.aspx?id=16

Malicious Software Removal Tool is not compatible with your system.

You are running Windows10 64-bit. Although Malicious Software Removal Tool will not run on your system, you can download Malicious Software Removal Tool for other operating systems.

LOL....

nothing to do with malware,
it was just a broken linke somewhere....

RigtClick / Open with / Choose another app
solved my problem

(but i was too lazy to do that 2 days ago.... :wink: