I’m surprised it works at all! My understanding from a couple of years ago, is that it was waiting for the Arduino IDE to support the command line interface. Perhaps the code was in Fritzing, and just needed the Arduino IDE to catch up. It would be even better if you would like to help with development (as you have probably seen, it needs all the help it can get 
.) There are instructions for building Linux (fairly easy) and Windows (harder) but not the Mac (because I don’t have one) here:
“Easy” doesn’t mean not time consuming, the QT install alone is good for about an 8 hour download on my adsl line (usually a couple of times on Windows til I get the compiler installation correct) and the code base is complex, but it can be done. With a release scheduled, it is also worth doing, because pull requests against the code base on github are being accepted and merged in to the code base for the release (which hasn’t happened since 2016)
Peter