I turned off the firewall (temporarily) and it connected. I got the screen with the (limited) activities allowed in the app.
But none of them did anything. Not play, the arrow going back to the beginning of the project - nothing.
It seems kind of buggy and while likely very useful if it worked, trying to get it to work is taking me away from playing, recording, mixing.
Nice try, Acoustica, but I'd say it's probably too complex to have it work seamlessly for the wide number of possible things that could make it fail.
I also see on Google Play several downvotes - and no updates in years. so I suspect Acousitca decided (correctly) to spend their limited resources on other things.
Mixcraft 8 Pro (32bit) runs fine on my Toshiba Satellite C55-B laptop with a wimpy Celeron N2830 (dual core) - but I moved it to my "less wimpy" Dell 660S with a Dual Core Pentium.