Thanks for reporting the problem. I have TB 1.5 for testing and I confirm that the addon isn't visible there. The matter of fact that I'm not going to maintain backward compatibility of the extension with old versions of the TB.
I've started developing of the addon with TB 3.3. So, starting from TB 3.3 it will most probably work. I will change compatibility restrictions to something more appropriate like 3.0-11.0 in the next release of the addon. I'm going to release new version of the addon in the April.