What's new in v3.6:
*) fixed problem where some of the choice fields were in red even if proper value was selected;
*) fixed problem where initial configuration window was shown twice on first connect;
If you experience version related issues, then please report them to support@mikrotik.com.
Winbox is available here:
http://www.mikrotik.com/download
If you try to upgrade directly from Winbox loader and version is not available, then you might need to wait for a while until cache in path between your device and our servers is refreshed.