Currently, if a user turns on the experimental feature "Translation Editor", then attempts to access the submenu for it, the submenu will not open.
Note: This has worked in internal builds since 4.4.3, but has yet to work in a released build.
1. Open Editor
2. Open Editor Preferences>Experimental
3. Turn on Translation Editor
4. Go to Window>Translation Editor
Head over to the existing Questions & Answers thread and let us know what's up.