greetings, I need to download logo 8.0 software to upgrade 8.4, where can I download 8.0?

There is no download for LSC V8.0.

You can try to ask Siemens directly via Support Request.

If you mean you already have LOGO!Soft Comfort V8.0 and want to upgrade to the actual version, there is a link.

A downgrade is not possible. You can only buy a used DVD and install newly.

Upgrade LOGO!Soft Comfort V8.4 SP1:

https://support.industry.siemens.com/cs/ww/en/view/109975995

Hint: If you are not yet registered, the registration must be carried out beforehand because the software is restricted to export.

When registering, the check mark must be set for "Access authorization for downloading export-restricted software", see:

https://support.industry.siemens.com/cs/ww/en/view/109744535