Since our move from CodePlex to GitHub we lacked a proper forum.
Discource Forum was so kind to not only provide the software but also host the forum for free.

The category for MapWindow5 end-users is available at: https://mapwindow.discourse.group/c/mapwindow5-users
We've also created categories for MapWindow5 developers, MapWinGIS developers and MapWindow plug-in developers.

Please ask your question at the forums instead as a GitHub issue.