My C2 file crashes the browser tab every time.

I had a big game I was working on in C2, and I was going to buy C3 so I could keep working on it and stay up to date, but while it works fine in C2, it won't run in C3.

Do I just have to start over now?

I wish I hadn't bought C2. If I'd have known it was going to be discontinued, and my work wouldn't transfer, I wouldn't have. There goes the past 2 years.

Is there a solution?

Of course not. No of course not.

No, of course not.

Of course yes.

You need to investigate why your project is crashing and fix the problem. Check errors in browser console, try disabling big blogs of of code, until you find which event is causing the crash.