ZWCAD 2010 and the later version will be able to run on Windows 7 ® (Both 32 bit and 64 bit). But for ZWCAD former versions, which already existed before Windows 7® released, the dongle doesn’t work on this system.
To get the dongle work you can install the dongle driver for Windows 7 as below.
Dongle_Driver_win7.zip (zip- 1,580 KB)