Sorry, it’s not that simple. The H90 uses BLE MIDI which is not supported by Windows. We may have some workarounds you can try in the future but there is no timeframe for official Bluetooth support on Windows due to them not supporting BLE.
More information can be found here: https://www.thegearpage.net/board/index.php?threads/new-eventide-h90-harmonizer.2410601/page-158#post-38038468
