Attributes won't show

Hi,
I duplicated a website with the Excel Woocommerce plugin, migrated it to another server, then updated the plugin to a new version and changed the API key to a new one. For some reason, after the site was duplicated the product attributes won't show, although the "Attribute show for product" checkbox checked. Tried to re-calculate the memory several times, to downgrade to the previous version, to remove the plugin and add it again, to check and uncheck different attributes - nothing helps.
Could you advise anything, please?

Hi,
Sorry for the delayed answer. In the settings, the attributes are marked.
I checked some attributes through Products > Attributes, and those that I checked had same IDs. Anyway, there were more attributes added after the site was duplicated.
In the Settings, I tried to unselect all and save, and even re-calculate the memory, and then to select all - nothing shows...
Can it be anything else?

One more thing. Previously, I tried to remove the plugin and put it back in, but it saves all the settings.
Maybe, there is a way to remove this plugin completely and then to make a new installation?

Thank you, this helped