in the prior version there was a shortcut to list recent brains. There does not appear to be any such functionality in the personal brain 4.
Billcustomized Desktop PC (Haswell i7 4770 3.4 gHz with 32 GB RAM), Windows 10 Pro 64-bit, 256 GB SSD, and a Microsoft Surface Pro 2017, Windows 10, 512 GB SSD, 16 GB ram, i7