Is there any updated documentation on the label sync plugin? I found instructions here: https://bitcointalk.org/index.php?topic=154144.0 but that seems to be for an older version of the plugin. The help icon references this page https://github.com/maran/electrum-sync-server but doesn't talk about usage of the client. Do I just click "force upload" on the computer that has my labels and then "force download" on my watching only wallets, without signing up for any account or entering an API key?