FYI, we have already replied your email.
The problem is usually caused by some anti-virus software or network security software, please double check if you have any such software.
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DriveHQ Online Backup has two components:
(1) Windows GUI Program:
Which is used to create / manage backup tasks;
(2) The background Windows Service. (Administrative Tools --> Services, you can find DriveHQBackup Service);
After you have created backup tasks using the GUI program, the GUI program is no longer required to run the backup tasks.
Please check if the Backup Service is running fine by checking in your Operating system's Administrative Tools --> Services window. Also check your Windows Task manager, see if you can find DHQBackupSvc.exe.
We also need to know exactly at which step does the GUI program crash. A screenshot will be very helpful.