[Enigmail] Error opening encrypted attachment

[Robert Ryan]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

If someone sends me an encrypted attachment and I try to open it with
'Decrypt and Open' a dialog pops up (see attached). It warns me that an
external application must be launched to open the file, but when I click
'Launch Application' nothing happens. How can I fix this?

The 'Launch Application' button is grayed out in the photo. This is a
function of the screen capture software. It is a functioning button when
when I try to click it.
- --
Robert Ryan
rbrt_ryn at yahoo.com

I prefer encrypted, signed email :)
Use PGP key: 0x3E5EFB06

===================================
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Version: GnuPG v1.4.9 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iQEcBAEBCAAGBQJIifyFAAoJEPPvtS8+XvsGEwAIALqtsVFV3MAIUVHkZBpnUxUy
svkz50zGWdIQ8Jwf0F+GPlBZk+Fq0Dae9N+ct8tblI8ko0TeS2CACB6Iv7sMukK9
/hF3T0CXREkJnYnt09x/iR77umsH+UJXsj4tXm7VzX1C+ESHrappzZuYXSvvC7nx
smDjwkqC0OcGTX7/YVNpprIf9jAc06bJDFXiQ3mB7IlIM6yWOWWrxwuz80KL90NB
vR+ER+/ADATQIQk4kWDLqQcX8nfFrLvRETUL/Y73eXxP87GkLJSrlbjsDpsG/qqC
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=RgL8
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