Hi, I have a programme created with 8.3 version and with the lwe for 8.3. now I  have updated to 8.4 with the new web editor and does not want to recognize the 8.3 device.  What can I do please?   Can I go back the lwe to match 8.3 ?

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Split from Is it possible to update Siemens LOGO! from version 8.3 to 8.4?.

There is no LWE editor version especially for LOGO! 8.3 or 8.4.
The LWE editor is only available for all LOGO! versions from LOGO! 8.2 onwards.

The current version of the LWE editor is V1.2.1. The user-defined web pages created with it can be used with LOGO! 8.2, 8.3, and 8.4.

What's exact is your problem?