Can't connect Thonny 4.0.0 using Pimoroni Pico W Enviro 1.19.7 UF2

[djbloc]

Bought a Enviro Indoor with Pico W included.

Using Ubuntu 18.04 PC and Thonny 4.0.0, Thonny is unable to connect to the Pico.

When I upload the Raspberry Pi Pico W UF2 (rp2-pico-w-20220826-unstable-v1.19.1-337-gbd4e45fd6.uf2) to the device, Thonny automatically connects and MicroPython shell appears and files on the Pico are shown.

However, if I load the 1.19.7 UF2 (pimoroni-picow_enviro-1.19.7-micropython.uf2) Thonny does not connect (include trying all the manual ports) and no files are shown