Hiya, sorry to hear that.Does the online version works for you ? https://SpriteStack.io/studio
As an intermediate solution please create a FREE patreon account and let me know your username. I will unlock the online version for you. Sorry but that's the only thing I can do until the next release.
As rude as this answer is - No. :D
I mean it's so huge any estimation I make gets delayed. For sure earlier than April 2020.
ps: I have unlocked browser based spritestack version for your patreon account. It may take a while for the system to recache users.