How do you update it on windows? I've been trying to figure it out and don't wan to start all over.
Viewing post in Build 0.6: I dare you to play this build! comments
You should be able to just download it and the saves SHOULD automatically get sensed and ported over to the new version.
Just keep in mind there are occasionally compatibility issues between versions in which your save might no longer be compatible with the newest version.
We're working on something nice to mitigate this issue in the near future though, since we know it can be a pain to have to play through everything again just to get to where you were before.