This update files are valid for:

Kat.-No.    Device
560-320	    CU1000
520-200	    XL3000flex (Operating unit)

A software package includes two files of the same name with the file extension KEY and EXE.
The addition (MX3 or MX6) in the file name indicates the hardware for which the software is designed.
If the current CU1000 contains software prior to version 2.81, only the software package matching the hardware may be on the USB stick used for the update. From software V2.81 on, the correct software package is used automatically.

The ARCHIVE folder contains older series versions for the CU1000

---------- File verification ----------
Files with the sha256 extension contain the hash values of the corresponding files.
They are not needed for the upgrade process.

You can use them to verify the integrity of the downloaded file.

To do this, you need a tool that supports the SHA-256 algorithm.
The verification compares the hash value of the file to the value stored in the .sha256 file.

Verification steps:
Download the file and the corresponding .sha256 file.

Use a hash calculation tool, such as
On Linux/macOS: the built-in sha256sum command
On Windows: Tools such as CertUtil or external programs such as HashCheck

Example for Linux:
    sha256sum -c filename.sha256

Example for Windows:
    certutil -hashfile filename SHA256
Open the .sha256 file with any text editor and manually compare the hash output with the file content.