As others have mentioned, it has not received much love recently from the developer. My guess is that it is due to the pricing model and accepting donations. I have donated $200 back in 2014 but I did not see many supporters back then and none now. There is no incentive for the developer to keep maintaining and enhancing the product. Everyone who used this tool in the past and liked itshould consider supporting it if not with money then with their time and knowledge on github.
Can they not just turn into subscription model for something like $10/mo or even $5/mo and get things done instead of floating with nightlies?
I'm sure people cry and scream for going paid but seeing this disappear with lack of recent MySQL version support and likely never support any other DB looks pretty sad too.