Membership plugin - Tables for MultiDB?

I've reinstalled the membership plugin into the /plugins directory.

I am using it on my main site and want to give supporters the option to use it.

Previously, I could not save the membership levels as discussed in this thread

That's fixed now. But I do see that if I activate the plugin on a subblog, that the plugin activates but no membership options appear.

I assume that its because of MultiDB, right?

So are there tables to add in MultiDB and if so where do I look to find them?