Explorer2 on Windows 10 Pro (update from website seemed hassle-free) :-

Driver version: 1.67.0
Firmware Version: 0x1717
(according to the Meridian USB Control Panel).

When playing the 2L downloaded files through Roon I get 2 white & 1 blue lights on my Explorer2, which is currently hooked up to my desktop PC.
I need to get it hooked up to my DSP8000.2-USE's !

EDIT / UPDATE : Just FYI, I've hooked up my Explorer2 both to my Desktop PC & my Surface 3 Pro, both through Roon, and I can flick between the (Kate Busby) MQA files (green light) & the (2L download sampler) MQA Studio files (blue light) at will. So, in theory, it's all working.

Trinnov Altitude CI-12; Meridian 861v8 + ID41 + UHD722v2 + 271, 2*SE-update DSP8.2Ks, SE-update DSP7200HC, 4*DSP3200, 4*DSP33, 218, 251
JVC DLA-NZ8; Panasonic TX-P60ZT60E; Lumagen Radiance Pro 5348
Roon [13i7 Win.11 NUC]; SKY Q; Oppo UDP-203EU; AppleTV / Fire Cube / Roku / NVidia