A few minutes ago we've released the Client + Server Wallet package (preview) at
https://github.com/Heat-Ledger-Ltd/heatwallet/releases
And new client at:
https://github.com/Heat-Ledger-Ltd/heat-ui/releases
Asset exchange is preliminarily enabled for some asset types. Next version will enable all assets including the traditional ones of HEAT /Asset.
BTC/HEAT decentralized market should work.
https://heatwallet.com/#/trader/5592059897546023466/0
Getting BTC in and out is centralized & experimental at this point and may incur delays.
Further release notes with instructions and more info will follow within some days.