The problem happens for users who encrypt the email using the settings under the email File dialog (File > Encrypt), ...

If you're not happy with the default Windows file manager, you're in luck because there are plenty of options that improve on the original.

If you are not able to open the .exe file on your computer and you see a message Can’t open .exe file, read this article for some suggestions that may help you fix the problem. Some users upgraded to ...