I want to select a certificate and then it prompts me to install a file manager??? Are you kidding? I already have one.
KitKat compatibility: Require additional permission to read a certificate file from USB storage.
Now uses file manager to find certificates if none found internally.
Added high-resolution images.
Configuration option to not display a notification for "single-red".
Note: on reboot, under some circumstances, the widget won't start. That's a documented Android restriction.
Tap on the widget and "Check now" when it remains grey.