Yes, you must update to 2.4.0.0.


If you still her the Runtime error, do this:

1. Stop/shutdown your wallet client if it is running.
2. Go to %appdata%/solaris/ (Open your file explorer and type that into the path field)
3. Delete all files and folders EXCEPT wallet.dat (Back-up this file somewhere safe as well), solaris.conf and masternode.conf (I REPEAT, DO NOT DELETE wallet.dat, solaris.conf and masternode.conf)
4. Start your wallet client and let it sync, your balance will be visible when you are synced.