I went ahead with an uninstall/reinstall, and the problem has completely gone away. Not sure why.
I do have another problem, however, and that is when I save a screenshot. The behavior immediately launches Windows file explorer, which seems like a dreadful idea to me.
I've been looking for a setting I can tweak to avoid this, but no luck so far.
Thanks for replying, by the way!
I wonder if this means that your screenshot directory is set to a network location that is not yet available at boot time?
One option to solve this would be to figure out how to tell Screenshot Captor to start later in the bootup process.. I remember there were some tips on how to do this but I don't remember.
If you find the solution I hope you will share with us.
The other option is simply to set your screenshot directory to a local drive location instead of a network share location.