After installing Qt Creator on Xubuntu 14.04, the welcome screen is missing. The solution is to install the following missing package:
sudo apt-get install qtdeclarative5-qtquick2-plugin
This works with the following software version:
- Xubuntu 14.04 LTS
- Qt Creator 3.0.1
Help may also be missing. To install documention, have a look at this post.