Comment 3 for bug 437324

In older versions when cleaning free disk space and the user closed the window, BleachBit would continue invisible-ly. In the latest versions it should always be safe to close the window, and the stop button would work very similarly as closing the window.

In some cases it is not practical to stop in the middle of a process (such as vacuuming a single file), so BleachBit will finish that file.