Here's the latest Version 3.0 dev build. This isn't a pre-release build, in the fact that I don't recommend you keep this on a regular save. It's safe to install on any save that was made with Version 2.9, just don't keep it there for too long or make saves you intend to play on in the future.
This really is just for people (on Special/Anniversary Edition) who want to test out the new features in 3.0, and/or the new rewrites and revoice.
Again, don't keep it on on a regular save as a lot of things may change for the pre-release and the actual release. Some lines are still to be added, and code is missing/will be improved on. If you still do decide to ignore my advice, well... you're on your own.
But a clean save should do the trick? Again, it's like a game of Jenga. You'll never know when the whole thing will just come tumbling down, tumbling down, tumbling down. (that's an Eva reference).
https://1drv.ms/u/s!AnL8aTXycLICi8U1ilakFWiEWq-lyg?e=OuZ0XG