For the first time in nearly 3 years, MikuMikuDance has received an update, although it’s actually a fairly small one. Specifically, the version 9.27 update fixes a mouse bug with the Windows 10 Fall Creators Update.
If you run Windows 10, and encounter issues with the controls in MMD, be sure to grab the latest version from the official site! → http://www.geocities.jp/higuchuu4/index_e.htm