I haven't used the app in about a year, at which time it was working fine. However, when I start up the app now, the pause button says "running" but no graph is being displayed. If I wait a few minutes a graph appears, but it is static. Then a few minutes later the graph updates again. Something is making it extremely slow. While its behaving this way the app allows me to switch between 1/1/ and 1/3 octave display, and turn on and off peak and valley displays, but the graphs remain static.
I'm at the current version of iOS.
Aside from the passage of time and iOS updates, the other thing that's different is that I tried loading the iMM6 calibration file per the instructions on the iMM6 site. When I press the "Load" button a dialog pops up showing a file name that I think was the name I gave the file, with clear and cancel options below. If i tap the file name it seems to do nothing, and the clear and cancel options the dialog closes. This of course may be a totally separate issue unrelated to the performance issue above.
Any help would be appreciated.