Ok so managed to get to my scenes without deleting the app, but now I'm not sure why the rules are crashing the app.
So I have a Dynamic Clock module running into a Stream Byter module that has loaded "Block Clock" (from the "Event Filters" download from the Scenes Club feature) As soon as I start the Dynamic Clock, MidiFire crashes
the rules in the Stream Byter "Block Clock" are: FA-C = XX +B F8 = XX +B
Yes, I know what that is. It's a bug that is fixed in 1.10 - it will crash if you have any further rules after a (matched) block statement.
For now, just change those two rules to:
F8-C = XX +B
which will pretty much have the same effect without crashing.
I think 1.10 will be ready to submit to Apple by the end of this week, which will fix loads of current issues.
BTW - to recover from a saved scene that causes a crash on load, you can delete the file _working_buffer.mfr from the Documents directory using iTunes (I think) or iMazing/iFunBox and it should start up.