Hy! Is there a date for a new release or is it finished? It's just to understard if I can use this tool like the last stable version. Thanks again for all that work

Feel free to use the lastest version. It's stable.  Some internals are being worked on as improvements.   Work is progressing on adding more controls and extending some of the current ones.

It may become a plugin in the near future as well (free plugin) while keeping the GitHub in place.

Why, why, why...

Why I didn't see this thread before wasting 50 bucks in an abandoned, outdated ui package like Widget Candy?

Paul, thanks lot for all your hard work on this one. Looking forward to taking a look at your layout framework.

Is there a way to disable widgets? that is, making them unresponsive and with a visual clue of its state (probably increasing its transparency?)

Yep, I can add a visual clue of disabled widgets.  It will allow the developer to use the default settings or specify their own.  Support for extended sprite sheets, SVG (using the free plugin on marketplace) and additional controls are underway.

Widget Candy is awesome and don't feel bad, I spent $50 myself on it to realize it wasn't supported anymore.  That's part of what drove me to creating the new library with a focus on the business App side.  Of course with sprite sheets and SVG support it will move into both business and gaming.

The layout engine is kinda working like "div" tags and minor "css" you find in HTML5.  That approach is in my head due to being a web developer by day.