Thanks @AlSoKnown! It was a labor of love over 6 months, so the response is motivating! I'll reply to your feedback below if you like.
1) RE: All parts of the UI have hover text EXCEPT for the buttons in the Styles Tab and Hero Types tab. Mainly because there's so many buttons. Seeing hover-text pop-up every time I wanted to pick animation interfered too much over time. The "idle" animation for example having a "click to use the idle animation" tooltip-----now imagine that text for 70 other animations. It grows redundant when the button itself says "idle".
2) RE: Glad you noticed the extra export options. It's for niche scenarios when you don't want to save all 100 animations. I think I covered enough edge cases for now :)
3) RE: On UI-----you should have seen Version 1.0 UI before there were any tabs lol. This 2.0 was a much-needed UX overhaul!
4) RE: MORE WILL COME!! In fact, Version 1.0 had only 5 Animations while this 2.0 has Over 100!! Others asked for more and so it is done. Melee Attacks and others I planned on placing in a separate Sprite Mixer. It'd be far overwhelming to have 100 attack animations added :)
5) RE: I'll accept "Inspiration Generator" for 500 Rupies! Lowers the barrier of entry for those without art skills, especially for new devs or game jammers. Check out Mythril2D RPG Top-Down Game Maker for Unity---all these sprites are compatible with it, if you want to create a new game just to use it :)