From what I can see on-line the HD5450 won't be up to the job for the HOOPS graphics system. Please review the System Requirements for Alibre
Alibre Design has system requirements in order to run the software including operating systems, computer ram, video cards, CPU and storage. Learn more!
www.alibre.com
particularly the 'more on video cards' section.
The HD5450 was launched in 2010 and only has 0.5GB of dedicated VRAM.
The Legacy Display option in Alibre uses much earlier technology. It is limited to DirectX 9 and doesn't support some of the recent additions to the software. Note also that Legacy Display will be retired, you can't assume it will still be in future versions.