As of today, there is a beta version of Winlink Express 18.104.22.168 which integrates the new software TNCs ARDOP and even VARA. There is also an update for the corresponding RMS Trimode software (the counterpart for RMS Gateways).
You may install and test the version using the Flag (within settings) Automaticaly install field-test (beta) versions of Winlink Express. Click update. After the restart of Winlink Express, the application will search for new (beta) software and install it automatically.