We used to do full refunds between alpha stages, but we don't do it anymore because there are too many players already and doing so skews the gameplay experience plus makes holes in our budget which are hard to bear (as we are a small indie team and this game project exists solely on players donations). We still trying to do some sort of partial refunds like we did before alpha 5 launch, refunding last month payments, but this is not a guarantee, so you can hope it will happen again, but don't count on it.
