Dear HI-TEC99, HCP

Thank you very much for your help. I was successfully able to :

1. Export the private keys from Multibit Classic (disconnected the internet, solved the grayed out problem)
2. Imported into Electrum
3. Did a sweep of all the balance into new Electrum address with high fee for fast transaction

I think the problem was that I had over 200 wallet addresses which was causing the blockchain sync/reset issue

Thank you for all the help. And apologies to OP for hijacking the thread.