There are currently no plans for officially supporting Bluetooth for Windows. It’s not a simple request, the H90 uses the BLE protocol and that is not supported by Windows.
We may be able to provide instructions for a workaround at some point, but this will not be officially supporting Bluetooth on Windows because Windows does not offer BLE support.
More information can be found here: https://www.thegearpage.net/board/index.php?threads/new-eventide-h90-harmonizer.2410601/page-158#post-38038468
