PokerTracker

I remember a past built of PT3 letting me copy HH in text format, I could then post hands in Weaktight .Has PT3 version 3.12.1 had the format changed ? I don't seem to be able to do this anymore.

It hasn't, but at this point I would strongly recommend upgrading to the beta anyway - 3.13.11 has many fixes that are not in 3.12.1. So I'd say update to 3.13.11 first, then double click the hand you want data from and you should see the copy to clipboard buttons.