On Friday this week it is expected that forging rewards will be re-activated. To forge with a desktop wallet, you have to do the following:

1) Check the height of the blockchain with the blockchain explorer (icon number 3 from top left)
2) Go to "Apps Server" (item number 6 from top left) and then click on "Start Server". Wait until the number of synced blocks equals the blockchain height from step 1) - you can see this in the log output window below the clickable buttons (this will take a while, several minutes).
3) Click on "Start Mining"

Forging rewards will initially be very generous, expected to be 7-8% per month or more than a doubling of your HEAT balance in a year. To forge a block per day, you need approximately 3800 HEAT if about 50% of all HEAT is forging (26,500,000 / 3,456 * 50%). To double-check that you have set up forging correctly, your account should appear in this report: https://heatbrowser.com/report.html after the first block has been forged.