As detailed below, we are moving our UI codebase to Action-Script 3. This will open up more UI performance optimization in future releases, as well as make the workflow for mod creators consistent. But in the short term, this change impacts the modding community as they update their mods to work with Action-Script 3. We have worked with key modmakers to check compatibility on our biggest mods, and have been able to verify 9.15.1 compatibility with a number of them.

See the "Mods" tab below for more details -- and if you experience any issues, please uninstall any mods and contact the mod creator for additional support (Wargaming can't provide customer support for third-party mods).