If a backup is stuck on a running progress, there is normally a file named running which should be deleted in either of these locations.
If the backup is running, delete the file named running or create a file named stop.
After a few minutes, the backup should stop.
Windows server version
Windows desktop version
Stop this process in task manager bJW.exe
Tags Ahsay OBM ACB v6 v7, stop running backup, hung, stalled