Where do I find the PirateBox version?

The most changes are directly related to PirateBox Script changes. Only in very rare cases the version of the OpenWrt image itself do change without a PirateBox Script change.

You need to connect to your PirateBox via

 ssh root@192.168.1.1

And then run:

cat /opt/piratebox/version

The output shows the Version number and some commit notes, which are less likely important on stable releases.