I think you may need to delete your configuration folder and reinstall the extensions you want to use.
first close Dreamweaver, then
In explorer type: %appdata%
Then browse to the dreamweaver version you are using and find the configuration folder under it.... rename it to configuration_old
Now open extension manager and remove all the extensions listed, then install any that you want. Then let me know if you have any problems from there and we can get on the phone to connect with you.