Hello! I just downloaded and tried to use Flash CC 2014. Code Hinting doesn't work! So I tried some way to bring it back. And the following solution worked:
1. Quit Flash
2. Delete Code Hint Folder: C:\Users\<user>\AppData\Local\Adobe\Flash CC 2014\en_US\Configuration\CodeModel
3. Open Flash and create a new document. Edit => Preferences => Code Editor. Change "Cache Files" to 1500
4. write: import<space>
You should see that warning: "Building Code Hint Cache...". If not, press Ctrl + <Space>
5. Wait 1 minute and enjoy your code hinting
Hope this help for someone...
(Sorry for my poor English)