Okay, I just found an "issue", not a bug that can be simply remedied.....
Apparently, I'm the ONLY person on version 1.4.33 and because of that, it's not compatible with anyone else. (Simply because they've chosen not to update to the latest version.) So, in effect, am I simply unable to fly online with everyone until they start downloading the latest version of JoinFS.
Because I downloaded and updated to the latest version, I'm on my own until others start downloading the latest version...
(Everyone else stopped downloading versions of JoinFS at 1.4.29) but I wanted my JoinFS to be as updated as possible, not realizing that I'd updated myself right of being able to fly online with everyone else
Issue here is: now I have to wait for everyone else on the planet to update to a version that I already have (or one that's compatible to the one I already have)...
This explains why whenever I right click on another aircraft, the "follow" menu comes up, but it's all "greyed-out", because my version of JoinFS isn't compatible with anyone else's....
I created a hub, and brought up the "hubs list", and I'm the ONLY one on 1.4.33