The "unofficial" 64-bit Windows drivers are now available for download from the Files section of the Battery Management forum.
Here is the direct link:
Why are they unofficial?
First, the officially supported tool to use with 64-bit Windows is the EV2400 which is now available for ordering.
Second, the 64-bit EV2300 USB implementation may conflict with other products that use the same default PID on the USB bus, like the TUSB3210 EVM.
Third, it hasn't been extensively tested on all Windows software and hardware configurations.