Job stopped on "file in use", no actions available

Using a late January '15 download of TI 2015, I get a "file in use...act within 10 minutes" message.

When I open Acronis, and then the task, there is nothing indicating any action to take, such as an "Ignore/Retry" window.

Then when I stop the job (which eventually happens), and restart it, the job stays in "calculating time remaining" for a very long time (until restart, best I can tell).

Where is my option to do something about the file and the task?

Is there a setting for dealing with "File in Use?"

Or, what is the expectation? Don't use files that might be part of a backup job at that time?

And how should I be stopping and restarting the job, so that it doesn't hang up on the "calculating" step. (This has happened multiple times).

Any help with this would be appreciated.

Thanks!