I am not sure this will work. The GOG Galaxy client and update-plugin-manifest.py automatically updates any "official" plugins by downloading the list here:

https://raw.githubusercontent.com/FriendsOfGalaxy/cfg/master/config.json

For humble, it then downloads the associated URL:

https://raw.githubusercontent.com/FriendsOfGalaxy/galaxy-integration-humble/master/current_version.json

That still shows 0.9.5. So the GOG Galaxy client may just overwrite your 0.11.0 version because it thinks it is newer and has the same GUID.

This was reported in the humble repo here:

UncleGoogle/galaxy-integration-humblebundle#176

The upstream issue is here:

gogcom/galaxy-integrations-python-api#194

It looks like the synchronization process is broken and the original developer(s) are no longer working on the project.

I will leave this change in place, but if it doesn't work as expected, the above information is why 😁