OK well the gunzip seemed to "do the trick," but I don't recall before having to do anything other than run the pg_restore command. Anyway, thanks to everyone for all your help!
It says "Trading-Access: gzip compressed data, from Unix"
About the idea of not using pg_restore for these dumps, what I'm still missing is how it's worked for all these years before. Are there now more stringent standards being enforced?
You have restored from these dumps using pg_restore?
The command below says create a plain text file that has commands to clean database objects before recreating and store text in file ./Trading-Access using gzip compression at level 5:
