I just experienced VBXE not being detected in 4.10-test7 and could not understand why, but when removing and adding the VBXE in Devices it works just fine again. Possibly a bug.
Kind regards
Klas
EDIT: I am running Altirra in CrossOver on macOS, so this may work just fine if you run it in the intended setup on Windows.
EDIT: Mr 'Train-wreck' just found the reason - VBXE disabled in U1MB. I'll see myself out.