As for the right and left panel: it seems you have set to use the roundframe for them: check Tinyportal > Settings & Frontpage: Use the roundframe style for left/right panels
(that setting is pretty old by the way and I doubt it's usefulness, so I was considering to remove it...)
The modules enable / disable has been removed since the whole modules concept has been removed: that has never really brought what it was intended to bring. So the 'modules' TPdownloads, TPshout and TPlistimages are now just an integral part of TinyPortal.
Instead there is a switch in the TPdownloads settings now that allows you to switch it off: TinyPortal > Manage TPdownloads > Settings: "Show Downloads"
I'll check the shoutbox layout: that's new to me..