This will most likely be because you are running a very old version of Music Miner. Updating it would be your best bet.
You can get the installer for the latest Version1 build here: http://download.shedworx.com/musicminer/beta/JakstaMusicMiner-1.4.2.pkg
There is a good chance you will receive upgrade prompts to Version 2, which is a PAID upgrade that we released earlier this year, but it is not mandatory. You can turn off the prompts by going to Preferences > General and turning off the feature that does auto-checks for updates on startup.
There is a discounted upgrade offer for existing license holders, which can be accessed by following the prompts in the update checker pop-up notification.
Please be aware that we will not be releasing any more updates for Version 1, as we are focusing our development on Version 2.
From Liam @ 11 Sep 2017 11:09