Multiple Brainzip update mechanisms
One annoyance with bigger brains is the time it takes to create a Brainzip. Most of the time, I am backing up an existing Brain and I wish there was a more efficient way to update the brainzip. Perhaps a differential update or a mechanism where PB would only add the changes since the last export.

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edward commented
Support just gave me a trick. If you click the X on the creating Brainzip window, the process is done in the background and PB becomes usable again.
Not the solution I wanted but a stop-gap until they implement this.
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Karl Hebenstreit commented
Hopefully, this can be implemented fairly easily, as the synchronization process is already doing differential updates. For .brainzips, I would only want this one-way, so that .brainzips are archives.
This feature could probably also enable .brainzips for 'merging' by thought type. Being able to do this for a Person/People thought type would give us a way to manage an Address Book across multiple .brain files!