If you enable custom M codes:

#define CUSTOM_M_CODES
#ifdef CUSTOM_M_CODES
#define CUSTOM_M_CODE_SET_Z_PROBE_OFFSET 851
#define Z_PROBE_OFFSET_RANGE_MIN -5
#define Z_PROBE_OFFSET_RANGE_MAX -2
#endif

You can pause the printer and change the Z_OFFSET. But instead of doing that, I suggest you try disconnecting PronterFace from the printer (between prints) and resetting the Arduino board. Then reconnect PronterFace and start over. Some how... Doing that avoids the air prints.

The good news is the air printing bug has a lot of a attention and I do think it is going to get resolved very soon. My best advice is to hold on and wait for the fix instead of trying desperate things.