Rive support - Alpha testing

I tried to give the extension a try, but Defold is ending process, whenever I try to open a project with Rive data - either a project downloaded from extension repository or a totally new project, where I try just to import Rive model. It just closes Defold, no error pops up or anything. Windows laptop.

Also I would have a question - would I be able to use Rive animations in GUI?