If you can't get the Mac version to run, it's because the binary lost its executable bit. Open the Terminal. cd into the directory where Scrabdackle.app is located. Then do `chmod +x Scrabdackle.app/Contents/MacOS/Scrabdackle`.
After that, click to open the app as normal. You will see the message saying "you can't open because it's not verified..." Then go into Security & Privacy and click Open Anyway. From there, it should all start working.