Help required with syncing across a main site and subdomain

It seems this plugin has been abandoned. If there is anyone who can help, here is my question.

I did some research and it seems at least one person used this plugin with their main and subdomain site. I created a test main site (eg mainsite.com) and a test subdomain (eg subdomain.mainsite.com), then installed this plugin on both sites. I added the URLs of each site to the other’s plugin Remote Site settings, saved, then in the “Remote Sites” tab in the settings, I ticked the box “Roles” and “Create” of the corresponding column, ie in the main site settings, I set the settings in the “Outgoing Actions” column and stated the role I wanted to export, and set the same settings in the “Incoming Actions” column . My intention is that:

1. Only user roles I specify will get synced from the mainsite to the subdomain, including existing users. So the specified user role will get exported from the main site and the subdomain will import it.
2. When a new user signs up to the role I specified on the main site, I expect that user to be synced to the subdomain. If a new user signs up on the main site but to a different user role, they will NOT get synced.

The issues are:

1. According to the information on the plugin page, it said that synchronisation can occur automatically. But, the only syncing I have discovered is manual exporting and importing of users which is pointless since there are other methods that allow user import and export. So, the question is, how do I get the syncing to happen automatically?
2. When I exported a test sample of users of a given role from the main site and checked the option “Export users with their roles”,a file was created and downloaded to my local computer which I then had to upload to the subdomain site manually. After I imported the users, the user roles were not exported and they gained the default user role on the subdomain instead. I thought the whole point of ticking “Export users with their roles” was so that their role is exported too and this new role is created on the subdomain site. Also, their extended profile infomation and log in password were not exported, so the user has to reset their password via a forgotten pasword link. This means effectively the only thing that has happened is a new user with the exact same username and email address was created after importing – something entirely pointless since it is no different to the users creating a new account on the subdomain manually. The whole point for me trying this plugin was that I was hoping that syncing it would allow users of a certain role already registered on the main site to be automatically registered on the subdomain.

Thanks to anyone that can help.