If one accidentally opens StarAlignment and forgets to clear and load new files, so that StarAlignment tries to run with the file names from the previous run, and those files no longer exist, it is impossible to abort the process because each failed file-access pops-up an error dialogue that blocks all other functionality, such as the "Pause/Abort button, but the pop-up for the next failed file access pop-ups before any other button can be pressed. That means the ONLY way to stop the process is to terminate PI through Task Manager, or face a long night of clearing error message pop-ups one at a time with 300+ files in the list.
