Alright, this is my first time posting here, but I have a very, very crude way to try and get as much of v0.9.9 as possible (it's definitely not enough, but it's a start?)
First, download 0.9.3B from page 1, and play until a fair bit after the demo cutoff point.
Then, download the v0.9.9 demo, and extract it using winrar.
Next, copy your save folder from v0.9.3B into v0.9.9.
Finally, go into v0.9.3B's data folder, and copy the entire thing into the v0.9.9 demo's data folder, but remember to NOT REPLACE existing files when prompted. This is essentially using an earlier full version to fill in what assets are missing from the demo, while keeping everything that's new.
This essentially bypasses the demo stop-point, and prevents most of the missing assets from being problems.
You may have to do this for other files, like audio, but the game starts off at my late-game save without crashing or any call errors (so far). If you have any later full version than 0.9.3B, then I'd use that instead.