When Session Buddy upgrades from v3 to v4 it normally automatically transfers your data.
However, because of recent Chrome deprecations, Session Buddy will be unable to do this automatically if you’re using Chrome 124 or later (more likely now than when v4 first came out). In this case, you’ll need to transfer your data manually.
To do so, follow these steps:
1) Use the Session Buddy v4 migration tool to create a restore file from your Session Buddy v3 data
2) Drop the created restore file into Session Buddy by following the Restore steps outlined here: https://sessionbuddy.com/restore/