Also there is an exchange that supports Thorcoin linked in below. I have posted on their forum about this update and sent a PM to their mods but have not heard back from them. As far as I know this is the only exchange that supports Thorcoin so it is vital that they update their client.
https://www.scificryptoexchange.com/#/trade/exchange/31Comkort and Europex also support Thorcoin. I will send them emails to let them know.
Off one of their web pages:
Info! Europex is unlisting THOR . Please cancel your orders and withdraw your coins before Sunday 8th June 20h00 UTC, else your coins will be destroyed.