This is now the SIXTH thread you've created with some variation of this complaint. Given that reality, have you considered that creating forum topics over and over again about this might not be a productive path toward resolution? Are you figuring that the sixth, seventh, or tenth thread might be the charm? And actually, one of your threads -- this one
-- ended with a response from Macrium Support asking you to submit a support ticket. Did you actually do that? If not (or even if you did, given that that was now almost a year ago), maybe try submitting a formal support ticket rather than creating threads here for the cases where you're encountering a Busy response unexpectedly.Reflect always being busy when you attempt to run a manual backup is not normal, as-designed behavior.
That means that the behavior you're seeing is probably due to something specific about your PC environment that's affecting Reflect. And THAT means that the FIX is going to involve either making a change to whatever is affecting Reflect in your setup, or possibly updating Reflect so that it isn't affected by whatever aspect of your environment is causing that behavior. But EITHER WAY, it's probably going to involve you collaborating with Macrium so they can perform some analysis on your specific environment, which means that just making rant threads demanding a fix isn't going to be useful. In order to figure out what the fix should be, Macrium would have to understand the cause of problem, and the problem you're experiencing is not typical behavior, so they can't just install Reflect somewhere to see the behavior you're seeing.
And then for editing definition files while Reflect is busy, maybe consider using the WISH LIST section of the forum to create a topic requesting the ability to edit definition files while a backup is running, since that would be an enhancement request, not a problem report. As a general bit of advice, it helps to separate problem reports from enhancement requests, since they are two completely different things.
And lastly, you could also just add new posts to existing threads rather than creating brand new ones every time....