I've also emailed support. I can't remember where the log files are found and I don't want to re-open TheBrain in case this exacerbates the situation. If someone can remind me I will mail them to support also.
I just opened TheBrain. It opened normally and told me there was an updated version (188.8.131.52) available. I allowed it to update & restart.
On restarting I see an error:
Brain Data Verification
Data is missing in the following locations:
Were files from these folders moved or deleted? If you can restore them, please close TheBrain and do so before restarting.
I have not modified any files in the Brains folder and, indeed, the previous version of TheBrain opened without an error. The only thing that happened in between was allowing TheBrain to download & update.
I am alarmed at the possibility that I have lost data.
I have done a lot of work over the weekend while away and not had access to Time Machine. Presumably it is safely sync'd in BrainCloud. And I am wondering why TheBrain seems unable to heal itself…
What should I do next?
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