I don't think if MaxisysPro can De-Activate this system............But, yes you can refill the tank and reset the counter use a Vag-Com or VAS.........
I personal not used MaxisysPro for this task so can not comet if it can reset or not.........May be support team can give us some feed back on this if MaxisysPro can do it or not.................
Watch the link below ................
https://www.youtube.com/watch?v=1h9hWlvg6sM