Cannot add Plugin Anytag

[CBviert]

Just out of interest: what has happened to your "Not enough memory"-problem?

Honestly it's not clear due to several attempts to solve my problem. Due to the hint of

petermad:
"Configuration" -> "Zip packer" -> "ZIP" -> "Always use internal unzipping (if possible)".

I set this item as active. Perhaps this led to the message Not enough Memory! disappearing.
Finally, the hints of

Wilhelm M.: ... Proceed by selecting "Configure custom columns" and see if the plugin is listed there.

and

Dalai : ... plugin will appear in the custom columns configuration window; it just needs to be opened...

were decisive.

Thanks again for all the assistance