TB's been just a tad bit busy with school and other things. He's still (slowly) working on StuffPlug 3, though no release date is set yet. For now, you can either not use the tab manager or disable it any time you want to use the options panel. Other than that, just be patient and something will come along soon enough.
Hmmm, I vaguely remember I tackled this bug sometime.
Didn't I release a version that fixed it?
Silly me :/
Twas just a stupid mistake in the code to redirect the "Tabs" thing in options to the StuffPlug dialog...