To stop a running backup job,
1. Remote on to the Protected System
2. Stop the Replibit Agent Service
3. Delete the shadow copies
a. Open a command prompt with Admin privileges one of the two below depending on the OS
b. vssadmin delete shadows /all
c. DISKSHADOW then type delete shadows all
4. Now start the Replibit Agent Service.
After a few minutes the backup job will stop with an error.