ACCON-S7-Backup 4.4.20.0 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This software is a product of DELTALOGIC Automatisierungstechnik GmbH.
The most popular version among the software users is 4.4. We recommend checking the downloaded files with any free antivirus. The most frequent installer filename for the program is: S7BkUp.exe. ACCON-S7-Backup lies within System Utilities, more precisely Backup & Restore.
From the developer:
ACCON-S7-Backup is a comfortable and easy to handle software for back upping and restoring S7 programs. ACCON-S7-Backup directly uses S7 projects of the SIMATIC Manager without converting so that existing projects can easily be continued to use immediately. There is a multitude of ways of communication to communicate with the S7 PLCs.
You may want to check out more software, such as Sansa Connect Device Recovery, LexarMedia ImageRescue Software or OS Backup Wizard, which might be similar to ACCON-S7-Backup.