Hello Mate,
I've just dropped you a PM lol and you had replied here that was fast , the dev is long gone so I don't think he'd ever return to release an update and believe it was high time long time ago he did, yup everyone who's interested on GRW will need to update since already the network is stalled by the previous client , no mining , no sending or receiving , no confirmation of blocks , we've done some code updates to prevent negative Retargets in the future as per suggested almightyruler , he is credited for the same as well as getting mining fixed temporarily earlier and suggested and also predicted that the network will stall again if a proper update is not released as well as adopted.

New Wallet (Updated to version 1.2.1)
*Checkpoints Added
*Negative Retarget Fixed (courtesy of almightyruler)
*version Updates Posted
*Community Backed Development Announced

So all in all everyone who has GRW or is interested in the crypto , traders and everyone who has GRW on their wallets who were unable to anything before and wants to trade now will need to update mate.

Cheers!
Soopy