1.6. Game version. Group stage: Battle.net 1.29 (W3arena will be the default platform if one of the two players can't/disagree to play on Battle.net for only the 2 first playweeks).
Playoff: Battle.net 1.29.
So far default was w3arena since its second playweek...
3.3. Match time. Every match on every play week is automatically assigned at Saturday 17-00 CET(CEST, if the summer time). Player which does not show get a technical defeat (waiting time 15 minutes). By mutual agreement players can change date and time of the match, but only into play week (read point 3.2).
If you are not coming anytime soon, I wont be able to play till next week again.. I came but you are not here