You can rename "C:\Users\yourusername\AppData\Roaming\Opera Software\Opera Stable" and "C:\Users\yourusername\AppData\Local\Opera Software\Opera Stable" to start with a new profile. That might fix it.
You can goto the URL opera://about and make sure you have 95.0.4635.90. That's the last version of Opera that supports Windows 7.
If the crash is due to a bug in Opera (and not a corrupted profile), you're out of luck as the crash won't be fixed as Windows 7 is no longer supported.