Exchanges – Access currencies stored in Cryptobridge?

I just discovered, though too late, that Cryptobridge has closed.

Now, there is much to say about this particularly dubious movement, but I will not and will keep it simple:

How can I access the coins stored in the Cryptobridge wallet?

I saved the .bin file and can access my Bitshares account through OpenLedger, but the only currency that appears is Bitshares. Bitcoin is just one of the coins that are / were stored in that wallet.

I have searched and some forums say that it is possible by logging in to another exchange. Well, that is what I have done and that clearly did not work.

I hope this simple question has a simple answer, even if that answer is: "You can't."