Works, but hard to figure out where it went at first

After installation I was able to tune one guitar, but then the app closed itself and would not reopen. After I restarted the computer it opened again, only to close itself after about 5 seconds. It worked well when it stayed open!

Edit: It does open! It just immediately minimizes to a little tuning fork near the clock in the upper right of the screen.

Rdunlin about insTuner - Chromatic Tuner for Guitar, Ukulele and String Instruments