Kleopatra won't let me click sign and encrypt

[huw]

Hi

I'm trying to sign and encrypt a file using Kleopatra.  I've done it hundreds 
of times but since switching distros it no longer works.  I can go all the way 
through the dialogues until I get to the last step where I select which 
certificate to use then click sign & encrypt...the sign & encrypt button 
remains greyed out and unclickable even after selecting my certificate.

It does recognise my certificate correctly, and identifies it as mine, trusted, 
signed etc.  I can also use the same certificate on the command line using gpg, 
so I think this is an issue purely with Kleopatra.

According to its about dialogue I'm using the following:

Kleopatra 2.2.0
Qt 5.5.1
The xcb windowing system.

I'm also running OpenSUSE Leap 42.1.

Any advice would be appreciated.

Kind regards,
Huw
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