Sorry to say – but we’ve not improved the progress bar experience yet. It’s there, but it doesn’t reflect actual progress very well.
We have very few comments on this, I think most users like software to be “quiet” and without notifications and pop-ups…
Reading this again, I see that you might not be happy even when the progress bar is “fixed” – you really want a pop-up when it’s done! This is actually easier and might indeed get done faster, so I’ve made a new issue for this: https://bitbucket.org/axantum/axcrypt-net/issues/431/desktop-notification-when-a-lengthy .