I'm currently running NewBB 2 Final. I noticed that there weren't any update scripts from 2 Final to 2.01. Was that intentional?

MUST-DO: replace your main.php but only if you not use 2.0.9.2
/modules/system/admin/modulesadmin/main.php with the
-- Bugfix for block update

Also, I've tried reading through and applying the above fix, but I'm just not sure what this is supposed to do. When I applied it a while ago, it messed up my administration area, so I had to remove it. (I'll give you details later as I'm at work and don't have access to my site.)

I'm running 2.0.7.3. I've read the comments for 2.0.9.2 and I just can't see upgrading yet. I see that there were some security fixes in the new version. If I have GIJOE's security mod installed, should I be protected even though I'm still at 2.0.7.3?

i upgrade from 2.0.7.3 to 2.0.9.2 without any problem.even i test it in local and my test site and it is really smooth.
by the way for install newbb 2.01 you dont need to upgrade to 2.0.9.2 you can install newbb 2.01 with XOOPS 2.0.7.3 as well.
and i dont know what is your problem with replace /modules/system/admin/modulesadmin/main.php