Two quick crashes Win10/Audacity 3.1.3

Around about 13:50 Newfoundland time (1.5 hours ahead of New York) 3.1.3 crashed twice and sent off anonymous reports. That was me, if you want to get in touch or have me experiment.
I am going to reboot and start again.
I was in the middle of running repeated “Assemble” macros to assemble several WAV files into a single MP3 files.
If it happens again I shall stop running the macro and do it by hand.
Cheers
Chris