Did you take a look here? https://lexiconpro.com/en/softwares/alpha-driver-v2-7-windows
There are specific instructions stated for Windows 10.
My Alpha Lexicon gave no signal despite following the instructions. The driver definitely loaded and everything looked good but no signal coming in on my Cubase LE -- loaded Switch to ASIO for all driver and works fine. My Tech level is high...Strange.
Nothing working...ASIO4all shows input problem and Alpha Lexicon driver show all in's out's available but no signal ...using Cubase LE last build 2008.