Unfortunately, the dxdiag that you have sent confirms that your machine does not meet our Minimum System Requirements. I have included a link to our Topaz Labs Documentation page for your review:
Your machine’s VRAM only shows 3 GB, but our minimum application requirement is 6GB.
It is recommended that v3.0.4 or v2.4.2 be used, which may give you a more stable application for this machine. You can use the following links to download these installers for your review:
The newer interface that all v3 have, but v3.0.4 does not have the new Autopilot updates
It can sometimes work on underpowered machines, however, will be slower than v2.4.2
Let us know how that goes or if you have any issues reverting to the previous versions. If you have access to another computer, we can check its compatibility.