Thanks Qwertycoin_QWC! I got the latest 64-bit version of the Wallet and replaced all the binary and other related files in my existing Wallet folder. My wallet files stayed there and were not affected.

After relaunching the new Wallet, it picked up my existing transactions using the same setup and showing the previous balances just fine/

Do I need to delete any files under my AppData\Roaming\qwertycoin\ too before the height reaches 40k or they are going to be auto-refreshed?

Anything else I missed that needed to be done for mandatory update?

Thanks!