Lookup Engines not available
I needed to reinstall Zotero and now the Lookup Engines are not available:
I replaced the engines.json file with the one on https://github.com/bwiernik/zotero-tools, and they seem activated:
But they still seem to be unavailable. Am I doing something wrong?

I replaced the engines.json file with the one on https://github.com/bwiernik/zotero-tools, and they seem activated:

But they still seem to be unavailable. Am I doing something wrong?
Many thanks Poettli.
But it is not possible to manage all of them. The management box only shows the first 5 and does not allow you to scroll down or increase the window size: