hi! so i'm a kickstarter backer and i've been trying to get the person in charge to remove any purchase links/update this page regarding cancellation of this ver and redirection to the new game since the update was posted several months ago. i have unfortunately been ignored, which bodes well, lol.
i did a bit of digging and... well. here is their current, active twitter/x account. i'm gonna be honest, there is probably a good chance you will be ignored as they seem quite content to ignore any questions/comments/concerns kickstarter backers have raised regarding the new version of this game but it might be your best shot to getting in contact with them.
you could also try to reach out to the new devs, with purchase proof of this version and see if they'd be willing to provide you with a key for the new game. you can post here, they seem pretty responsive.
sorry i can't do more.