Can't you remember the casino where you gambled?
I lost the program name I used to establish the account when my computer shut down.
Check your browser history, the site must be recorded there unless you've used a TOR browser or incognito.
Now when I log in, I get the new account number and my old account number isn't associated with my email address. How can I log in just using my old bitcoin address. The money has to be out there somewhere.
You have to tell us what's this website, old bitcoin addresses that has been used can still be used to receive incoming transfers. Your story is confusing but I think that someone has access to your account and withdrew your funds elsewhere?