v3.0b6 is a little screwed up on Windows 10. Rated 5 out of 5 stars
This is a must have addon. It's too bad Mozilla is heading towards killing off this and countless more addons by removing XUL support, and morphing into Chrome clone.
Unpublished v3 beta is much more useful then current v2, but unfortunately it suffers from bug that affects how manager window looks and function on Windows 10.
The support is non-existing for these who don't have an account on DTA bug tracker, new accounts don't get activation email, any emails I've sent went into a void with no return.
For these who is using DTA v3.0b6+ on Windows 10, install this in addon in parallel with DTA: